fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for those servers to be unreachable during trunking detection.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - kernel: out-of-bounds write in __btrfs_map_block in fs/btrfs/volumes.c (CVE-2019-19816)

  - Kernel: use-after-free in btf_dump_name_dups in tools/lib/bpf/btf_dump.c (CVE-2022-3534)

  - drivers/scsi/libsas/sas_scsi_host.c in the Linux kernel before 4.16 allows local users to cause a denial     of service (ata qc leak) by triggering certain failure conditions. NOTE: a third party disputes the     relevance of this report because the failure can only occur for physically proximate attackers who unplug     SAS Host Bus Adapter cables (CVE-2018-10021)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The version of kernel installed on the remote host is prior to 5.10.59-52.142. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2022-004 advisory.

    2024-12-05: CVE-2021-47299 was added to this advisory.

    2024-12-05: CVE-2021-47328 was added to this advisory.

    2024-12-05: CVE-2021-47300 was added to this advisory.

    2024-12-05: CVE-2021-47329 was added to this advisory.

    2024-12-05: CVE-2021-47327 was added to this advisory.

    2024-12-05: CVE-2021-47338 was added to this advisory.

    2024-11-08: CVE-2021-47354 was added to this advisory.

    2024-06-19: CVE-2021-47322 was added to this advisory.

    2024-06-19: CVE-2021-47325 was added to this advisory.

    2023-11-29: CVE-2023-4732 was added to this advisory.

    A flaw was found in the Linux kernel, where a BPF program can obtain sensitive information from kernel     memory via a Speculative Store Bypass side-channel attack. This issue occurs when the protection mechanism     neglects the possibility of uninitialized memory locations on the BPF stack. The highest threat from this     vulnerability is to confidentiality. (CVE-2021-34556)

    A flaw in the Linux kernel allows a privileged BPF program to obtain sensitive information from kernel     memory via a Speculative Store Bypass side-channel in the eBPF subsystem (CVE-2021-35477)

    A vulnerability was found in the Linux kernel. Missing size validations on inbound SCTP packets may allow     the kernel to read uninitialized memory. (CVE-2021-3655)

    A lack of CPU resources in the Linux kernel tracing module functionality was found in the way users use     the trace ring buffer in specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could     use this flaw to starve the resources causing denial of service. (CVE-2021-3679)

    A flaw use-after-free in the Linux kernel USB High Speed Mobile Devices functionality was found in the way     user detaches USB device. A local user could use this flaw to crash the system or escalate their     privileges on the system. (CVE-2021-37159)

    ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

    A flaw was found in the hanging of mounts in the Linux kernel's NFS4 subsystem where remote servers are     unreachable for the client during migration of data from one server to another (during trunking     detection). This flaw allows a remote NFS4 server (if the client is connected) to starve the resources,     causing a denial of service. The highest threat from this vulnerability is to system availability.
    (CVE-2021-38199)

    In the Linux kernel, the following vulnerability has been resolved:

    xdp, net: Fix use-after-free in bpf_xdp_link_release (CVE-2021-47299)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix tail_call_reachable rejection for interpreter when jit failed (CVE-2021-47300)

    In the Linux kernel, the following vulnerability has been resolved:

    NFSv4: Fix an Oops in pnfs_mark_request_commit() when doing O_DIRECT (CVE-2021-47322)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation (CVE-2021-47325)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails (CVE-2021-47327)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: iscsi: Fix conn use after free during resets (CVE-2021-47328)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: megaraid_sas: Fix resource leak in case of probe failure (CVE-2021-47329)

    In the Linux kernel, the following vulnerability has been resolved:

    fbmem: Do not delete the mode that is still in use (CVE-2021-47338)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/sched: Avoid data corruptions (CVE-2021-47354)

    An issue was discovered in the Linux kernel before 5.13.3. lib/seq_buf.c has a seq_buf_putmem_hex buffer     overflow. (CVE-2023-28772)

    A flaw was found in the Linux Kernel's memory management subsytem. In this flaw, A task is exiting and     releasing 2MB page in a vma (vm_area_struct) and hits the BUG statement in pfn_swap_entry_to_page()     referencing pmd_t x. This may allow a local user to crash the Linux kernel. (CVE-2023-4732)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.4.141-67.229. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-006 advisory.

    2024-12-05: CVE-2021-47327 was added to this advisory.

    2024-12-05: CVE-2021-47329 was added to this advisory.

    2024-12-05: CVE-2021-47338 was added to this advisory.

    2024-12-05: CVE-2021-47328 was added to this advisory.

    2024-11-08: CVE-2021-47354 was added to this advisory.

    2024-06-19: CVE-2021-47325 was added to this advisory.

    2024-03-13: CVE-2021-35477 was added to this advisory.

    A flaw was found in the Linux kernel. This flaw allows attackers to cause a denial of service (soft     lockup) by triggering the destruction of a large SEV VM, which requires unregistering many encrypted     regions. The highest threat from this vulnerability is to system availability. (CVE-2020-36311)

    In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because     of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a     side-channel attack, aka CID-9183671af6db. (CVE-2021-33624)

    A flaw in the Linux kernel allows a privileged BPF program to obtain sensitive information from kernel     memory via a Speculative Store Bypass side-channel in the eBPF subsystem (CVE-2021-35477)

    A vulnerability was found in the Linux kernel. Missing size validations on inbound SCTP packets may allow     the kernel to read uninitialized memory. (CVE-2021-3655)

    A lack of CPU resources in the Linux kernel tracing module functionality was found in the way users use     the trace ring buffer in specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could     use this flaw to starve the resources causing denial of service. (CVE-2021-3679)

    ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

    A flaw was found in the Linux kernel, where it incorrectly computes the access permissions of a shadow     page. This issue leads to a missing guest protection page fault. (CVE-2021-38198)

    A flaw was found in the hanging of mounts in the Linux kernel's NFS4 subsystem where remote servers are     unreachable for the client during migration of data from one server to another (during trunking     detection). This flaw allows a remote NFS4 server (if the client is connected) to starve the resources,     causing a denial of service. The highest threat from this vulnerability is to system availability.
    (CVE-2021-38199)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation (CVE-2021-47325)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails (CVE-2021-47327)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: iscsi: Fix conn use after free during resets (CVE-2021-47328)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: megaraid_sas: Fix resource leak in case of probe failure (CVE-2021-47329)

    In the Linux kernel, the following vulnerability has been resolved:

    fbmem: Do not delete the mode that is still in use (CVE-2021-47338)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/sched: Avoid data corruptions (CVE-2021-47354)

    An issue was discovered in the Linux kernel before 5.13.3. lib/seq_buf.c has a seq_buf_putmem_hex buffer     overflow. (CVE-2023-28772)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 4.14.268-205.500. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2022-1761 advisory.

    2024-12-05: CVE-2022-48757 was added to this advisory.

    2024-12-05: CVE-2022-48786 was added to this advisory.

    2024-12-05: CVE-2022-48799 was added to this advisory.

    2024-08-14: CVE-2022-48804 was added to this advisory.

    2024-08-14: CVE-2022-48805 was added to this advisory.

    2024-08-14: CVE-2022-48809 was added to this advisory.

    2024-08-01: CVE-2022-48742 was added to this advisory.

    2024-08-01: CVE-2022-48711 was added to this advisory.

    2024-08-01: CVE-2022-48760 was added to this advisory.

    2024-08-01: CVE-2022-48724 was added to this advisory.

    2024-08-01: CVE-2022-48743 was added to this advisory.

    2024-08-01: CVE-2021-47620 was added to this advisory.

    A buffer overflow flaw in the Linux kernel BPF subsystem was found in the way users run BPF with long jump     over an instruction sequence where inner instructions require substantial expansions into multiple BPF     instructions. A local user could use this flaw to crash the system or escalate their privileges on the     system. (CVE-2018-25020)

    A denial of service flaw was found in fuse_do_getattr in fs/fuse/dir.c in the kernel side of the FUSE     filesystem in the Linux kernel. A local user could use this flaw to crash the system. (CVE-2020-36322)

    AMD recommends using a software mitigation for this issue, which the kernel is enabling by default. The     Linux kernel will use the generic retpoline software mitigation, instead of the specialized AMD one, on     AMD instances (*5a*). This is done by default, and no administrator action is needed. (CVE-2021-26341)

    AMD recommends using a software mitigation for this issue, which the kernel is enabling by default. The     Linux kernel will use the generic retpoline software mitigation, instead of the specialized AMD one, on     AMD instances (*5a*). This is done by default, and no administrator action is needed. (CVE-2021-26401)

    A flaw was found in the hanging of mounts in the Linux kernel's NFS4 subsystem where remote servers are     unreachable for the client during migration of data from one server to another (during trunking     detection). This flaw allows a remote NFS4 server (if the client is connected) to starve the resources,     causing a denial of service. The highest threat from this vulnerability is to system availability.
    (CVE-2021-38199)

    An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces     subsystem was found in the way users have access to some less privileged process that are controlled by     cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of     control groups. A local user could use this flaw to crash the system or escalate their privileges on the     system. (CVE-2021-4197)

    In the Linux kernel, the following vulnerability has been resolved:

    Bluetooth: refactor malicious adv data check (CVE-2021-47620)

    Non-transparent sharing of branch predictor selectors between contexts in some Intel(R) Processors may     allow an authorized user to potentially enable information disclosure. (CVE-2022-0001)

    Non-transparent sharing of branch predictor within a context in some Intel(r) Processors may allow an     authorized user to potentially enable information disclosure via local access. (CVE-2022-0002)

    A random memory access flaw was found in the Linux kernel's GPU i915 kernel driver functionality in the     way a user may run malicious code on the GPU. This flaw allows a local user to crash the system or     escalate their privileges on the system. (CVE-2022-0330)

    A stack overflow flaw was found in the Linux kernel's TIPC protocol functionality in the way a user sends     a packet with malicious content where the number of domain member nodes is higher than the 64 allowed.
    This flaw allows a remote user to crash the system or possibly escalate their privileges if they have     access to the TIPC network. (CVE-2022-0435)

    A NULL pointer dereference was found in the Linux kernel's UDF file system functionality in the way the     user triggers the udf_file_write_iter function for a malicious UDF image. This flaw allows a local user to     crash the system. (CVE-2022-0617)

    The Amazon Linux kernel now enables, by default, a software mitigation for this issue, on all ARM-based     EC2 instance types. (CVE-2022-23960)

    A flaw was found in the Linux kernel. When an application tries to open a directory (using the O_DIRECTORY     flag) in a mounted NFS filesystem, a lookup operation is performed. If the NFS server returns a file as a     result of the lookup, the NFS filesystem returns an uninitialized file descriptor instead of the expected     ENOTDIR value. This flaw leads to the kernel's data leak into the userspace. (CVE-2022-24448)

    In the Linux kernel, the following vulnerability has been resolved:

    tipc: improve size validations for received domain records (CVE-2022-48711)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping() (CVE-2022-48724)

    In the Linux kernel, the following vulnerability has been resolved:

    rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink() (CVE-2022-48742)

    In the Linux kernel, the following vulnerability has been resolved:

    net: amd-xgbe: Fix skb data length underflow (CVE-2022-48743)

    In the Linux kernel, the following vulnerability has been resolved:

    net: fix information leakage in /proc/net/ptype (CVE-2022-48757)

    In the Linux kernel, the following vulnerability has been resolved:

    USB: core: Fix hang in usb_kill_urb by adding memory barriers (CVE-2022-48760)

    In the Linux kernel, the following vulnerability has been resolved:

    vsock: remove vsock from connected table when connect is interrupted by a signal (CVE-2022-48786)

    In the Linux kernel, the following vulnerability has been resolved:

    perf: Fix list corruption in perf_cgroup_switch() (CVE-2022-48799)

    In the Linux kernel, the following vulnerability has been resolved:

    vt_ioctl: fix array_index_nospec in vt_setactivate (CVE-2022-48804)

    In the Linux kernel, the following vulnerability has been resolved:

    net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup (CVE-2022-48805)

    In the Linux kernel, the following vulnerability has been resolved:

    net: fix a memleak when uncloning an skb dst and its metadata (CVE-2022-48809)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 4.14.268-139.500. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2022-1571 advisory.

    Amazon Linux has been made aware of a potential Branch Target Injection (BTI) issue (sometimes referred to     as Spectre variant 2). This is a known cross-domain transient execution attack where a third party may     seek to cause a disclosure gadget to be speculatively executed after an indirect branch prediction.
    Generally, actors who attempt transient execution attacks do not have access to the data on the hosts they     attempt to access (e.g. where privilege-level isolation is in place). For such attacks to succeed, actors     need to be able to run code on the (virtual) machine hosting the data in which they are interested.

    To mitigate this issue, Amazon Linux recommends that customers disable unprivileged eBPF.  This     configuration, having the unprivileged eBPF disabled, is the current default for most Linux distributions     and as of this advisory, is also the default for all Amazon Linux kernels.

    Specific mitigations for various CPUs are listed below.

    Intel CPUs:For Intel CPUs, this applies to all instance types that have CPUs with eIBRS support. They     are:*6i* (all sizes), c5d.metal, c5.metal, g4dn.metal, i3en.metal, m5*.metal, r5*.metal

    Vectors outside of unprivileged eBPF are not currently known, and Intel recommends disabling unprivileged     BPF, as mentioned above. However, optionally enabling spectre_v2=eibrs,lfence on Linux kernel command     line on the instance types mentioned above, would provide additional protection.

    AMD CPUs:As part of the investigation triggered by this issue, AMD now recommends using a different     software mitigation inside the Linux kernel, which the Amazon Linux kernel is enabling by default. This     means that the Linux kernel will use the generic retpoline software mitigation, instead of the specialized     AMD one, on AMD instances (*5a*). This is done by default, and no administrator action is needed.

    ARM CPUs:The Amazon Linux kernel now enables, by default, a software mitigation for this issue, on all     ARM-based EC2 instance types.

    A buffer overflow flaw in the Linux kernel BPF subsystem was found in the way users run BPF with long jump     over an instruction sequence where inner instructions require substantial expansions into multiple BPF     instructions. A local user could use this flaw to crash the system or escalate their privileges on the     system. (CVE-2018-25020)

    A denial of service flaw was found in fuse_do_getattr in fs/fuse/dir.c in the kernel side of the FUSE     filesystem in the Linux kernel. A local user could use this flaw to crash the system. (CVE-2020-36322)

    A flaw was found in the hanging of mounts in the Linux kernel's NFS4 subsystem where remote servers are     unreachable for the client during migration of data from one server to another (during trunking     detection). This flaw allows a remote NFS4 server (if the client is connected) to starve the resources,     causing a denial of service. The highest threat from this vulnerability is to system availability.
    (CVE-2021-38199)

    An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces     subsystem was found in the way users have access to some less privileged process that are controlled by     cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of     control groups. A local user could use this flaw to crash the system or escalate their privileges on the     system. (CVE-2021-4197)

    Non-transparent sharing of branch predictor selectors between contexts in some Intel(R) Processors may     allow an authorized user to potentially enable information disclosure. (CVE-2022-0001)

    Non-transparent sharing of branch predictor within a context in some Intel(r) Processors may allow an     authorized user to potentially enable information disclosure via local access. (CVE-2022-0002)

    A random memory access flaw was found in the Linux kernel's GPU i915 kernel driver functionality in the     way a user may run malicious code on the GPU. This flaw allows a local user to crash the system or     escalate their privileges on the system. (CVE-2022-0330)

    A stack overflow flaw was found in the Linux kernel's TIPC protocol functionality in the way a user sends     a packet with malicious content where the number of domain member nodes is higher than the 64 allowed.
    This flaw allows a remote user to crash the system or possibly escalate their privileges if they have     access to the TIPC network. (CVE-2022-0435)

    A NULL pointer dereference was found in the Linux kernel's UDF file system functionality in the way the     user triggers the udf_file_write_iter function for a malicious UDF image. This flaw allows a local user to     crash the system. (CVE-2022-0617)

    A flaw was found in the Linux kernel. When an application tries to open a directory (using the O_DIRECTORY     flag) in a mounted NFS filesystem, a lookup operation is performed. If the NFS server returns a file as a     result of the lookup, the NFS filesystem returns an uninitialized file descriptor instead of the expected     ENOTDIR value. This flaw leads to the kernel's data leak into the userspace. (CVE-2022-24448)References to     CVE-2021-26401, CVE-2021-26341 and CVE-2022-23960 have been added after the original release of this     advisory, however those vulnerabilities were fixed by the packages referenced by this advisory's initial     release on 2022-03-07

    References to CVE-2022-0847 have been removed after the original release of this advisory, as we have     determined that the code within kernel versions prior to 5.8 is not affected by CVE-2022-0847.

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in the Linux kernel before 5.0.19. The XFRM subsystem has a use-after-free,     related to an xfrm_state_fini panic, aka CID-dbb2483b2a46. (CVE-2019-25045)

  - An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-     free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is     called, aka CID-f5449e74802c. (CVE-2020-36385)

  - In pfkey_dump of af_key.c, there is a possible out-of-bounds read due to a missing bounds check. This     could lead to local information disclosure in the kernel with System execution privileges needed. User     interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-110373476     (CVE-2021-0605)

  - An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66     and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read     the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process's     memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222     4.19.177 5.4.99 5.10.17 5.11 (CVE-2021-21781)

  - A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c.
    This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name     space (CVE-2021-22555)

  - An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable     out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer     arithmetic operations, the pointer modification performed by the first operation is not correctly     accounted for when restricting subsequent operations. (CVE-2021-29155)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading     to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not     protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized     data that might represent sensitive information previously operated on by the kernel. (CVE-2021-31829)

  - An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-     device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with     special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or     a leak of internal kernel information. The highest threat from this vulnerability is to system     availability. (CVE-2021-31916)

  - The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because     the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads     to writing an arbitrary value. (CVE-2021-33033)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic     operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel     memory, leading to local privilege escalation to root. In particular, there is a corner case where the off     reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
    (CVE-2021-33200)

  - In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because     of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a     side-channel attack, aka CID-9183671af6db. (CVE-2021-33624)

  - fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer     allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an     unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

  - The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when     the source register was known to be 0. A local attacker with the ability to load bpf programs could use     this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and     possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in     the upstream kernel in commit 9b00f1b78809 ('bpf: Fix truncation handling for mod32 dst reg wrt zero') and     in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101. (CVE-2021-3444)

  - net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from     kernel stack memory because parts of a data structure are uninitialized. (CVE-2021-34693)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest     OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e. (CVE-2021-37576)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66     and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read     the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process's     memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222     4.19.177 5.4.99 5.10.17 5.11 (CVE-2021-21781)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in     the Linux kernel through 5.13.13. (CVE-2021-40490)

  - The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab     out-of-bounds write. Input from a process that has the CAP_NET_ADMIN capability can lead to root access.
    (CVE-2021-42008)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in the Linux kernel before 5.0.19. The XFRM subsystem has a use-after-free,     related to an xfrm_state_fini panic, aka CID-dbb2483b2a46. (CVE-2019-25045)

  - An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-     free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is     called, aka CID-f5449e74802c. (CVE-2020-36385)

  - In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free.
    This could lead to local escalation of privilege with no additional execution privileges needed. User     interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID:
    A-204573007References: Upstream kernel (CVE-2021-1048)

  - An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66     and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read     the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process's     memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222     4.19.177 5.4.99 5.10.17 5.11 (CVE-2021-21781)

  - A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c.
    This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name     space (CVE-2021-22555)

  - In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because     of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a     side-channel attack, aka CID-9183671af6db. (CVE-2021-33624)

  - fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer     allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an     unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

  - net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from     kernel stack memory because parts of a data structure are uninitialized. (CVE-2021-34693)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest     OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e. (CVE-2021-37576)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in     any net namespace because these changes are leaked into all other net namespaces. This is related to the     NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls. (CVE-2021-38209)

  - A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in     the Linux kernel through 5.13.13. (CVE-2021-40490)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2843 advisory.

  - Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP     socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux     kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.
    (CVE-2020-16119)

  - u'Specifically timed and handcrafted traffic can cause internal errors in a WLAN device that lead to     improper layer 2 Wi-Fi encryption with a consequent possibility of information disclosure over the air for     a discrete set of traffic' in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon     Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon     Wearables, Snapdragon Wired Infrastructure and Networking in APQ8053, IPQ4019, IPQ8064, MSM8909W,     MSM8996AU, QCA9531, QCN5502, QCS405, SDX20, SM6150, SM7150 (CVE-2020-3702)

  - In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This     could lead to local escalation of privilege with System execution privileges needed. User interaction is     not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References:
    Upstream kernel (CVE-2021-0920)

  - A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the     timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user     privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.
    (CVE-2021-20317)

  - An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass     RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users     with the ability to start and control a VM to read/write random pages of memory and can result in local     privilege escalation. (CVE-2021-22543)

  - An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions     before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. This flaw allows a local user to crash the     system or possibly escalate their privileges on the system. The highest threat from this vulnerability is     to confidentiality, integrity, as well as system availability. (CVE-2021-3612)

  - A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the int_ctl field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to     5.14-rc7. (CVE-2021-3653)

  - A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on     inbound SCTP packets may allow the kernel to read uninitialized memory. (CVE-2021-3655)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access     permissions of a shadow page, leading to a missing guest protection page fault. (CVE-2021-38198)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - inflect is vulnerable to Inefficient Regular Expression Complexity (CVE-2021-3820)

  - drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to     cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain     situations. (CVE-2021-38204)

  - drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for     attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM     pointer). (CVE-2021-38205)

  - A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in     the Linux kernel through 5.13.13. (CVE-2021-40490)

  - prealloc_elems_and_freelist in kernel/bpf/stackmap.c in the Linux kernel through 5.14.9 allows     unprivileged users to trigger an eBPF multiplication integer overflow with a resultant out-of-bounds     write. (CVE-2021-41864)

  - The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab     out-of-bounds write. Input from a process that has the CAP_NET_ADMIN capability can lead to root access.
    (CVE-2021-42008)

  - The firewire subsystem in the Linux kernel through 5.14.13 has a buffer overflow related to     drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt     mishandles bounds checking. (CVE-2021-42739)

  - An issue was discovered in the Linux kernel before 5.14.15. There is an array-index-out-of-bounds flaw in     the detach_capi_ctr function in drivers/isdn/capi/kcapi.c. (CVE-2021-43389)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects     the possibility of uninitialized memory locations on the BPF stack. (CVE-2021-34556)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store     operation does not necessarily occur before a store operation that has an attacker-controlled value.
    (CVE-2021-35477)

  - A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on     inbound SCTP packets may allow the kernel to read uninitialized memory. (CVE-2021-3655)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for     attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM     pointer). (CVE-2021-38205)

  - drivers/net/ethernet/xilinx/ll_temac_main.c in the Linux kernel before 5.12.13 allows remote attackers to     cause a denial of service (buffer overflow and lockup) by sending heavy network traffic for about ten     minutes. (CVE-2021-38207)

  - net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial     of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure     of a bind call. (CVE-2021-38208)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects     the possibility of uninitialized memory locations on the BPF stack. (CVE-2021-34556)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store     operation does not necessarily occur before a store operation that has an attacker-controlled value.
    (CVE-2021-35477)

  - A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the 'int_ctl' field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to     5.14-rc7. (CVE-2021-3653)

  - A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on     inbound SCTP packets may allow the kernel to read uninitialized memory. (CVE-2021-3655)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access     permissions of a shadow page, leading to a missing guest protection page fault. (CVE-2021-38198)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for     attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM     pointer). (CVE-2021-38205)

  - net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial     of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure     of a bind call. (CVE-2021-38208)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 16.04 ESM / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5136-1 advisory.

    It was discovered that the f2fs file system in the Linux kernel did not properly validate metadata in some     situations. An attacker could use this to construct a malicious f2fs image that, when mounted and operated     on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449)

    It was discovered that the FUSE user space file system implementation in the Linux kernel did not properly     handle bad inodes in some situations. A local attacker could possibly use this to cause a denial of     service. (CVE-2020-36322)

    It was discovered that the Infiniband RDMA userspace connection manager implementation in the Linux kernel     contained a race condition leading to a use-after-free vulnerability. A local attacker could use this to     cause a denial of service (system crash) or possible execute arbitrary code. (CVE-2020-36385)

    Ilja Van Sprundel discovered that the SCTP implementation in the Linux kernel did not properly perform     size validations on incoming packets in some situations. An attacker could possibly use this to expose     sensitive information (kernel memory). (CVE-2021-3655)

    It was discovered that the Qualcomm IPC Router protocol implementation in the Linux kernel did not     properly validate metadata in some situations. A local attacker could use this to cause a denial of     service (system crash) or expose sensitive information. (CVE-2021-3743)

    It was discovered that the virtual terminal (vt) device implementation in the Linux kernel contained a     race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker     could possibly use this to expose sensitive information. (CVE-2021-3753)

    It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC     objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Aspeed Low Pin Count (LPC) Bus Controller implementation in the Linux kernel     did not properly perform boundary checks in some situations, allowing out-of-bounds write access. A local     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. In     Ubuntu, this issue only affected systems running armhf kernels. (CVE-2021-42252)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may     cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl     (KDSETMDE). The highest threat from this vulnerability is to data confidentiality. (CVE-2021-3753)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5120-1 advisory.

    It was discovered that the f2fs file system in the Linux kernel did not properly validate metadata in some     situations. An attacker could use this to construct a malicious f2fs image that, when mounted and operated     on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449)

    It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure     Boot Forbidden Signature Database (aka dbx) protection mechanism. An attacker could use this to bypass     UEFI Secure Boot restrictions. (CVE-2020-26541)

    It was discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not     ensure enough processing time was given to perform cleanups of large SEV VMs. A local attacker could use     this to cause a denial of service (soft lockup). (CVE-2020-36311)

    It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform     reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could     start and control a VM could possibly use this to expose sensitive information or execute arbitrary code.
    (CVE-2021-22543)

    Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly     validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC     objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Xilinx LL TEMAC device driver in the Linux kernel did not properly calculate     the number of buffers to be used in certain situations. A remote attacker could use this to cause a denial     of service (system crash). (CVE-2021-38207)

    It was discovered that the ext4 file system in the Linux kernel contained a race condition when writing     xattrs to an inode. A local attacker could use this to cause a denial of service or possibly gain     administrative privileges. (CVE-2021-40490)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5106-1 advisory.

    Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free     adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)

    It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure     Boot Forbidden Signature Database (aka dbx) protection mechanism. An attacker could use this to bypass     UEFI Secure Boot restrictions. (CVE-2020-26541)

    It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform     reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could     start and control a VM could possibly use this to expose sensitive information or execute arbitrary code.
    (CVE-2021-22543)

    Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly     validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5091-2 advisory.

    Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the     Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack.
    An attacker could use this to expose sensitive information. (CVE-2021-33624)

    It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu     ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle     device removal events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2021-38204)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5092-2 advisory.

    Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free     adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)

    Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the     Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack.
    An attacker could use this to expose sensitive information. (CVE-2021-33624)

    Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-34556)

    Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-35477)

    It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu     ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

    It was discovered that the Option USB High Speed Mobile device driver in the Linux kernel did not properly     handle error conditions. A physically proximate attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2021-37159)

    Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did     not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause     a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Sun RPC implementation in the Linux kernel contained an out-of-bounds access     error. A remote attacker could possibly use this to cause a denial of service (system crash).
    (CVE-2021-38201)

    It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle     device removal events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2021-38204)

    It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report     pointer addresses in some situations. An attacker could use this information to ease the exploitation of     another vulnerability. (CVE-2021-38205)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5096-1 advisory.

    Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free     adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)

    Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-34556)

    Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-35477)

    Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly     validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu     ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

    It was discovered that the Option USB High Speed Mobile device driver in the Linux kernel did not properly     handle error conditions. A physically proximate attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2021-37159)

    Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private     clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    It was discovered that the BPF subsystem in the Linux kernel contained an integer overflow in its hash     table implementation. A local attacker could use this to cause a denial of service (system crash) or     possibly execute arbitrary code. (CVE-2021-38166)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Sun RPC implementation in the Linux kernel contained an out-of-bounds access     error. A remote attacker could possibly use this to cause a denial of service (system crash).
    (CVE-2021-38201)

    It was discovered that the NFS server implementation in the Linux kernel contained an out-of-bounds read     when the trace even framework is being used for nfsd. A remote attacker could possibly use this to cause a     denial of service (system crash). (CVE-2021-38202)

    Naohiro Aota discovered that the btrfs file system in the Linux kernel contained a race condition in     situations that triggered allocations of new system chunks. A local attacker could possibly use this to     cause a denial of service (deadlock). (CVE-2021-38203)

    It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle     device removal events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2021-38204)

    It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report     pointer addresses in some situations. An attacker could use this information to ease the exploitation of     another vulnerability. (CVE-2021-38205)

    It was discovered that the ext4 file system in the Linux kernel contained a race condition when writing     xattrs to an inode. A local attacker could use this to cause a denial of service or possibly gain     administrative privileges. (CVE-2021-40490)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5092-1 advisory.

    Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free     adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)

    Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the     Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack.
    An attacker could use this to expose sensitive information. (CVE-2021-33624)

    Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-34556)

    Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-35477)

    It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu     ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

    It was discovered that the Option USB High Speed Mobile device driver in the Linux kernel did not properly     handle error conditions. A physically proximate attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2021-37159)

    Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did     not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause     a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Sun RPC implementation in the Linux kernel contained an out-of-bounds access     error. A remote attacker could possibly use this to cause a denial of service (system crash).
    (CVE-2021-38201)

    It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle     device removal events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2021-38204)

    It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report     pointer addresses in some situations. An attacker could use this information to ease the exploitation of     another vulnerability. (CVE-2021-38205)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5091-1 advisory.

    Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the     Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack.
    An attacker could use this to expose sensitive information. (CVE-2021-33624)

    It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu     ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

    Alexey Kardashevskiy discovered that the KVM implementation for PowerPC systems in the Linux kernel did     not properly validate RTAS arguments in some situations. An attacker in a guest vm could use this to cause     a denial of service (host OS crash) or possibly execute arbitrary code. (CVE-2021-37576)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle     device removal events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2021-38204)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4978 advisory.

  - Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP     socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux     kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.
    (CVE-2020-16119)

  - u'Specifically timed and handcrafted traffic can cause internal errors in a WLAN device that lead to     improper layer 2 Wi-Fi encryption with a consequent possibility of information disclosure over the air for     a discrete set of traffic' in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon     Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music, Snapdragon     Wearables, Snapdragon Wired Infrastructure and Networking in APQ8053, IPQ4019, IPQ8064, MSM8909W,     MSM8996AU, QCA9531, QCN5502, QCS405, SDX20, SM6150, SM7150 (CVE-2020-3702)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest     OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e. (CVE-2021-37576)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds     write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without     the CAP_SYS_ADMIN capability. (CVE-2021-38166)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in     the Linux kernel through 5.13.13. (CVE-2021-40490)

  - loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain     privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by     using /proc//maps for exploitation. (CVE-2021-41073)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

An update of the linux package has been released.

ID	Name	Product	Family	Severity
199272	RHEL 8 : kernel (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	high
160434	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-004)	Nessus	Amazon Linux Local Security Checks	high
160429	Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-006)	Nessus	Amazon Linux Local Security Checks	high
158720	Amazon Linux 2 : kernel (ALAS-2022-1761)	Nessus	Amazon Linux Local Security Checks	high
158697	Amazon Linux AMI : kernel (ALAS-2022-1571)	Nessus	Amazon Linux Local Security Checks	high
158016	EulerOS Virtualization 3.0.6.0 : kernel (EulerOS-SA-2022-1070)	Nessus	Huawei Local Security Checks	high
156431	EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-2934)	Nessus	Huawei Local Security Checks	high
156347	EulerOS Virtualization 3.0.2.0 : kernel (EulerOS-SA-2021-2818)	Nessus	Huawei Local Security Checks	high
156163	Debian DLA-2843-1 : linux - LTS security update	Nessus	Debian Local Security Checks	high
155261	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2688)	Nessus	Huawei Local Security Checks	high
155119	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2713)	Nessus	Huawei Local Security Checks	high
154972	Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerabilities (USN-5136-1)	Nessus	Ubuntu Local Security Checks	high
154812	EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-2636)	Nessus	Huawei Local Security Checks	high
154338	Ubuntu 20.04 LTS : Linux kernel (Azure) vulnerabilities (USN-5120-1)	Nessus	Ubuntu Local Security Checks	high
153908	Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5106-1)	Nessus	Ubuntu Local Security Checks	high
153801	Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel (Raspberry Pi) vulnerabilities (USN-5091-2)	Nessus	Ubuntu Local Security Checks	high
153799	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5092-2)	Nessus	Ubuntu Local Security Checks	high
153789	Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5096-1)	Nessus	Ubuntu Local Security Checks	high
153770	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5092-1)	Nessus	Ubuntu Local Security Checks	high
153769	Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5091-1)	Nessus	Ubuntu Local Security Checks	high
153668	Debian DSA-4978-1 : linux - security update	Nessus	Debian Local Security Checks	high
152388	Photon OS 3.0: Linux PHSA-2021-3.0-0278	Nessus	PhotonOS Local Security Checks	high

Detections

Analytics

CVE-2021-38199

medium

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high

high