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

  - There is a memory leak in     perf_event_parse_addr_filter.(CVE-2020-25704)

  - Insufficient access control in the Linux kernel driver     for some Intel(R) Processors may allow an authenticated     user to potentially enable information disclosure via     local access.(CVE-2020-8694)

  - A flaw was found in the Linux kernel. A use-after-free     was found in the way the console subsystem was using     ioctls KDGKBSENT and KDSKBSENT. A local user could use     this flaw to get read memory access out of bounds. The     highest threat from this vulnerability is to data     confidentiality.(CVE-2020-25656)

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 openSUSE Leap 15.1 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

  - CVE-2020-28915: A buffer over-read (at the framebuffer     layer) in the fbcon code could be used by local     attackers to read kernel memory, aka CID-6735b4632def     (bnc#1178886).

  - CVE-2020-25669: A use-after-free in teardown paths of     sunkbd was fixed (bsc#1178182).

  - CVE-2020-25705: A flaw in the way reply ICMP packets are     limited in the Linux kernel functionality was found that     allowed to quickly scan open UDP ports. This flaw     allowed an off-path remote user to effectively bypassing     source port UDP randomization. The highest threat from     this vulnerability is to confidentiality and possibly     integrity, because software that relies on UDP source     port randomization are indirectly affected as well.
    Kernel versions may be vulnerable to this issue     (bnc#1175721 bnc#1178782).

  - CVE-2020-25704: A a memory leak in     perf_event_parse_addr_filter() was foxed (bsc#1178393,     CVE-2020-25704).

The following non-security bugs were fixed :

  - ACPI: NFIT: Fix comparison to '-ENXIO' (git-fixes).

  - bpf: Zero-fill re-used per-cpu map element (git-fixes).

  - can: af_can: prevent potential access of uninitialized     member in canfd_rcv() (git-fixes).

  - can: af_can: prevent potential access of uninitialized     member in can_rcv() (git-fixes).

  - can: dev: can_restart(): post buffer from the right     context (git-fixes).

  - can: m_can: m_can_handle_state_change(): fix state     change (git-fixes).

  - can: m_can: m_can_stop(): set device to software init     mode before closing (git-fixes).

  - can: mcba_usb: mcba_usb_start_xmit(): first fill skb,     then pass to can_put_echo_skb() (git-fixes).

  - can: peak_usb: fix potential integer overflow on shift     of a int (git-fixes).

  - docs: ABI: sysfs-c2port: remove a duplicated entry     (git-fixes).

  - drbd: code cleanup by using sendpage_ok() to check page     for kernel_sendpage() (bsc#1172873).

  - drm/i915: Break up error capture compression loops with     cond_resched() (git-fixes).

  - drm/vc4: drv: Add error handding for bind (git-fixes).

  - Drop sysctl files for dropped archs, add ppc64le and     arm64 (bsc#1178838). Also fix the ppc64 page size.

  - fs/proc/array.c: allow reporting eip/esp for all     coredumping threads (bsc#1050549).

  - ftrace: Fix recursion check for NMI test (git-fixes).

  - ftrace: Handle tracing when switching between context     (git-fixes).

  - futex: Do not enable IRQs unconditionally in     put_pi_state() (bsc#1067665).

  - futex: Handle transient 'ownerless' rtmutex state     correctly (bsc#1067665).

  - hv_netvsc: Add XDP support (bsc#1177819, bsc#1177820).

  - hv_netvsc: deal with bpf API differences in 4.12     (bsc#1177819, bsc#1177820).

  - hv_netvsc: Fix XDP refcnt for synthetic and VF NICs     (bsc#1177819, bsc#1177820).

  - hv_netvsc: make recording RSS hash depend on feature     flag (bsc#1178853, bsc#1178854).

  - hv_netvsc: record hardware hash in skb (bsc#1178853,     bsc#1178854).

  - hyperv_fb: Update screen_info after removing old     framebuffer (bsc#1175306).

  - inet_diag: Fix error path to cancel the meseage in     inet_req_diag_fill() (git-fixes).

  - Input: adxl34x - clean up a data type in adxl34x_probe()     (git-fixes).

  - kthread_worker: prevent queuing delayed work from     timer_fn when it is being canceled (git-fixes).

  - libceph: use sendpage_ok() in ceph_tcp_sendpage()     (bsc#1172873).

  - locking/lockdep: Add debug_locks check in
    __lock_downgrade() (bsc#1050549).

  - locking/percpu-rwsem: Use this_cpu_(inc,dec)() for     read_count (bsc#1050549).

  - locktorture: Print ratio of acquisitions, not failures     (bsc#1050549).

  - mac80211: minstrel: fix tx status processing corner case     (git-fixes).

  - mac80211: minstrel: remove deferred sampling code     (git-fixes).

  - memcg: fix NULL pointer dereference in
    __mem_cgroup_usage_unregister_event (bsc#1177703).

  - mmc: sdhci-of-esdhc: Handle pulse width detection     erratum for more SoCs (git-fixes).

  - mm/memcg: fix refcount error while moving and swapping     (bsc#1178686).

  - net: add WARN_ONCE in kernel_sendpage() for improper     zero-copy send (bsc#1172873).

  - net: ena: Capitalize all log strings and improve code     readability (bsc#1177397).

  - net: ena: Change license into format to SPDX in all     files (bsc#1177397).

  - net: ena: Change log message to netif/dev function     (bsc#1177397).

  - net: ena: Change RSS related macros and variables names     (bsc#1177397).

  - net: ena: ethtool: Add new device statistics     (bsc#1177397).

  - net: ena: ethtool: add stats printing to XDP queues     (bsc#1177397).

  - net: ena: ethtool: convert stat_offset to 64 bit     resolution (bsc#1177397).

  - net: ena: Fix all static chekers' warnings     (bsc#1177397).

  - net: ena: Remove redundant print of placement policy     (bsc#1177397).

  - net: ena: xdp: add queue counters for xdp actions     (bsc#1177397).

  - netfilter: nat: can't use dst_hold on noref dst     (bsc#1178878).

  - net: introduce helper sendpage_ok() in     include/linux/net.h (bsc#1172873). kABI workaround for     including mm.h in include/linux/net.h (bsc#1172873).

  - net/mlx4_core: Fix init_hca fields offset (git-fixes).

  - net: usb: qmi_wwan: add Telit LE910Cx 0x1230 composition     (git-fixes).

  - NFSv4.1: fix handling of backchannel binding in     BIND_CONN_TO_SESSION (bsc#1170630).

  - nvme-tcp: check page by sendpage_ok() before calling     kernel_sendpage() (bsc#1172873).

  - pinctrl: intel: Set default bias in case no particular     value given (git-fixes).

  - powerpc/pseries/cpuidle: add polling idle for shared     processor guests (bsc#1178765 ltc#188968).

  - powerpc/vnic: Extend 'failover pending' window     (bsc#1176855 ltc#187293).

  - powerpc/vnic: Extend 'failover pending' window     (bsc#1176855 ltc#187293).

  - regulator: avoid resolve_supply() infinite recursion     (git-fixes).

  - regulator: fix memory leak with repeated     set_machine_constraints() (git-fixes).

  - regulator: ti-abb: Fix array out of bound read access on     the first transition (git-fixes).

  - regulator: workaround self-referent regulators     (git-fixes).

  - Revert 'cdc-acm: hardening against malicious devices'     (git-fixes).

  - ring-buffer: Fix recursion protection transitions     between interrupt context (git-fixes).

  - scsi: libiscsi: use sendpage_ok() in     iscsi_tcp_segment_map() (bsc#1172873).

  - scsi: lpfc: Fix initial FLOGI failure due to BBSCN not     supported (git-fixes).

  - thunderbolt: Add the missed ida_simple_remove() in     ring_request_msix() (git-fixes).

  - time: Prevent undefined behaviour in timespec64_to_ns()     (git-fixes).

  - USB: Add NO_LPM quirk for Kingston flash drive     (git-fixes).

  - usb: core: driver: fix stray tabs in error messages     (git-fixes).

  - usb: host: ehci-tegra: Fix error handling in     tegra_ehci_probe() (git-fixes).

  - USB: serial: cyberjack: fix write-URB completion race     (git-fixes).

  - USB: serial: ftdi_sio: add support for FreeCalypso     JTAG+UART adapters (git-fixes).

  - USB: serial: option: add Cellient MPL200 card     (git-fixes).

  - USB: serial: option: add LE910Cx compositions 0x1203,     0x1230, 0x1231 (git-fixes).

  - USB: serial: option: add Quectel EC200T module support     (git-fixes).

  - USB: serial: option: add Telit FN980 composition 0x1055     (git-fixes).

  - USB: serial: option: Add Telit FT980-KS composition     (git-fixes).

  - USB: serial: pl2303: add device-id for HP GC device     (git-fixes).

  - video: hyperv: hyperv_fb: Obtain screen resolution from     Hyper-V host (bsc#1175306).

  - video: hyperv: hyperv_fb: Support deferred IO for     Hyper-V frame buffer driver (bsc#1175306).

  - video: hyperv: hyperv_fb: Use physical memory for fb on     HyperV Gen 1 VMs (bsc#1175306).

  - vt: Disable KD_FONT_OP_COPY (bsc#1178589).

  - x86/kexec: Use up-to-dated screen_info copy to fill boot     params (bsc#1175306).

  - xfs: fix a missing unlock on error in xfs_fs_map_blocks     (git-fixes).

  - xfs: fix flags argument to rmap lookup when converting     shared file rmaps (git-fixes).

  - xfs: fix rmap key and record comparison functions     (git-fixes).

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:2718 advisory.

  - kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)

  - kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)

  - kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

  - kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)

  - kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)

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 :

  - In do_epoll_ctl and ep_loop_check_proc of eventpoll.c,     there is a possible use after free due to a logic     error. 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-147802478References: Upstream kernel(CVE-2020-0466)

  - In the l2tp subsystem, there is a possible use after     free 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-152409173(CVE-2020-27067)

  - In the nl80211_policy policy of nl80211.c, there is a     possible out of bounds read due to a missing bounds     check. This could lead to local information disclosure     with System execution privileges needed. User     interaction is not required for exploitation.Product:
    AndroidVersions: Android kernelAndroid ID:
    A-119770583(CVE-2020-27068)

  - In audit_free_lsm_field of auditfilter.c, there is a     possible bad kfree due to a logic error in     audit_data_to_entry. 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-150693166References: Upstream     kernel(CVE-2020-0444)

  - In various methods of hid-multitouch.c, there is a     possible out of bounds write due to a missing bounds     check. 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-162844689References: Upstream kernel(CVE-2020-0465)

  - Use-after-free vulnerability in fs/block_dev.c in the     Linux kernel before 5.8 allows local users to gain     privileges or cause a denial of service by leveraging     improper access to a certain error     field.(CVE-2020-15436)

  - The Linux kernel before version 5.8 is vulnerable to a     NULL pointer dereference in     drivers/tty/serial/8250/8250_core.c:serial8250_isa_init
    _ports() that allows local users to cause a denial of     service by using the p->serial_in pointer which     uninitialized.(CVE-2020-15437)

  - A flaw was found in the Linux kernels implementation of     MIDI, where an attacker with a local account and the     permissions to issue an ioctl commands to midi devices,     could trigger a use-after-free. A write to this     specific memory while freed and before use could cause     the flow of execution to change and possibly allow for     memory corruption or privilege     escalation.(CVE-2020-27786)

  - No description is available for this     CVE.(CVE-2020-27815)

  - NULL-ptr deref in the spk_ttyio_receive_buf2() function     in spk_ttyio.c(CVE-2020-27830)

  - An issue was discovered in __split_huge_pmd in     mm/huge_memory.c in the Linux kernel before 5.7.5. The     copy-on-write implementation can grant unintended write     access because of a race condition in a THP mapcount     check, aka CID-c444eb564fb1.(CVE-2020-29368)

  - An issue was discovered in kmem_cache_alloc_bulk in     mm/slub.c in the Linux kernel before 5.5.11. The     slowpath lacks the required TID increment, aka     CID-fd4d9c7d0c71.(CVE-2020-29370)

  - An issue was discovered in romfs_dev_read in     fs/romfs/storage.c in the Linux kernel before 5.8.4.
    Uninitialized memory leaks to userspace, aka     CID-bcf85fcedfdd.(CVE-2020-29371)

  - A locking inconsistency issue was discovered in the tty     subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may     allow a read-after-free attack against TIOCGSID, aka     CID-c8bcd9c5be24.(CVE-2020-29660)

  - A locking issue was discovered in the tty subsystem of     the Linux kernel through 5.9.13.
    drivers/tty/tty_jobctrl.c allows a use-after-free     attack against TIOCSPGRP, aka     CID-54ffccbf053b.(CVE-2020-29661)

  - A slab-out-of-bounds read in fbcon in the Linux kernel     before 5.9.7 could be used by local attackers to read     privileged information or potentially crash the kernel,     aka CID-3c4e0dff2095. This occurs because     KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for     manipulations such as font height.(CVE-2020-28974)

  - An issue was discovered in the Linux kernel through     5.9.1, as used with Xen through 4.14.x. Guest OS users     can cause a denial of service (host OS hang) via a high     rate of events to dom0, aka     CID-e99502f76271.(CVE-2020-27673)

  - An issue was discovered in     drivers/accessibility/speakup/spk_ttyio.c in the Linux     kernel through 5.9.9. Local attackers on systems with     the speakup driver could cause a local denial of     service attack, aka CID-d41227544427. This occurs     because of an invalid free when the line discipline is     used more than once.(CVE-2020-28941)

  - An issue was discovered in the Linux kernel through     5.9.1, as used with Xen through 4.14.x.
    drivers/xen/events/events_base.c allows event-channel     removal during the event-handling loop (a race     condition). This can cause a use-after-free or NULL     pointer dereference, as demonstrated by a dom0 crash     via events for an in-reconfiguration paravirtualized     device, aka CID-073d0552ead5.(CVE-2020-27675)

  - A buffer over-read (at the framebuffer layer) in the     fbcon code in the Linux kernel before 5.8.15 could be     used by local attackers to read kernel memory, aka     CID-6735b4632def.(CVE-2020-28915)

  - A flaw was found in the Linux kernel. A use-after-free     memory flaw was found in the perf subsystem allowing a     local attacker with permission to monitor perf events     to corrupt memory and possibly escalate privileges. The     highest threat from this vulnerability is to data     confidentiality and integrity as well as system     availability.(CVE-2020-14351)

  - A flaw in the way reply ICMP packets are limited in the     Linux kernel functionality was found that allows to     quickly scan open UDP ports. This flaw allows an     off-path remote user to effectively bypassing source     port UDP randomization. The highest threat from this     vulnerability is to confidentiality and possibly     integrity, because software that relies on UDP source     port randomization are indirectly affected as well.
    Kernel versions before 5.10 may be vulnerable to this     issue.(CVE-2020-25705)

  - No description is available for this     CVE.(CVE-2020-25668)

  - No description is available for this     CVE.(CVE-2020-25669)

  - A flaw was found in the way RTAS handled memory     accesses in userspace to kernel communication. On a     locked down (usually due to Secure Boot) guest system     running on top of PowerVM or KVM hypervisors (pseries     platform) a root like local user could use this flaw to     further increase their privileges to that of a running     kernel.(CVE-2020-27777)

  - kernel: perf_event_parse_addr_filter     memory(CVE-2020-25704)

  - Insufficient access control in the Linux kernel driver     for some Intel(R) Processors may allow an authenticated     user to potentially enable information disclosure via     local access.(CVE-2020-8694)

  - A flaw was found in the Linux kernel. A use-after-free     was found in the way the console subsystem was using     ioctls KDGKBSENT and KDSKBSENT. A local user could use     this flaw to get read memory access out of bounds. The     highest threat from this vulnerability is to data     confidentiality.(CVE-2020-25656)

  - In kbd_keycode of keyboard.c, there is a possible out     of bounds write due to a missing bounds check. 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-144161459(CVE-2020-0431)

  - A flaw was found in the HDLC_PPP module of the Linux     kernel in versions before 5.9-rc7. Memory corruption     and a read overflow is caused by improper input     validation in the ppp_cp_parse_cr function which can     cause the system to crash or cause a denial of service.
    The highest threat from this vulnerability is to data     confidentiality and integrity as well as system     availability.(CVE-2020-25643)

  - A flaw was found in the Linux kernel in versions before     5.9-rc7. Traffic between two Geneve endpoints may be     unencrypted when IPsec is configured to encrypt traffic     for the specific UDP port used by the GENEVE tunnel     allowing anyone between the two endpoints to read the     traffic unencrypted. The main threat from this     vulnerability is to data     confidentiality.(CVE-2020-25645)

  - Vulnerability Summary for     CVE-2020-12351(CVE-2020-12351)

  - Vulnerability Summary for     CVE-2020-12352(CVE-2020-12352)

  - Vulnerability Summary for     CVE-2020-24490(CVE-2020-24490)

  - A missing CAP_NET_RAW check in NFC socket creation in     net/nfc/rawsock.c in the Linux kernel before 5.8.2     could be used by local attackers to create raw sockets,     bypassing security mechanisms, aka     CID-26896f01467a.(CVE-2020-26088)

  - A flaw was found in the Linux kernel's implementation     of biovecs in versions before 5.9-rc7. A zero-length     biovec request issued by the block subsystem could     cause the kernel to enter an infinite loop, causing a     denial of service. This flaw allows a local attacker     with basic privileges to issue requests to a block     device, resulting in a denial of service. The highest     threat from this vulnerability is to system     availability.(CVE-2020-25641)

  - In skb_to_mamac of networking.c, there is a possible     out of bounds write due to an integer overflow. 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-143560807(CVE-2020-0432)

  - A race condition between hugetlb sysctl handlers in     mm/hugetlb.c in the Linux kernel before 5.8.8 could be     used by local attackers to corrupt memory, cause a NULL     pointer dereference, or possibly have unspecified other     impact, aka CID-17743798d812.(CVE-2020-25285)

  - A flaw was found in the Linux kernel in versions from     2.2.3 through 5.9.rc5. When changing screen size, an     out-of-bounds memory write can occur leading to memory     corruption or a denial of service. This highest threat     from this vulnerability is to system     availability.(CVE-2020-14390)

  - A flaw was found in the Linux kernel before 5.9-rc4.
    Memory corruption can be exploited to gain root     privileges from unprivileged processes. The highest     threat from this vulnerability is to data     confidentiality and integrity.(CVE-2020-14386)

  - Insufficient input validation in i40e driver for     Intel(R) Ethernet 700 Series Controllers versions     before 7.0 may allow an authenticated user to     potentially enable a denial of service via local     access.(CVE-2019-0147)

  - A TOCTOU mismatch in the NFS client code in the Linux     kernel before 5.8.3 could be used by local attackers to     corrupt memory or possibly have unspecified other     impact because a size check is in fs/nfs/nfs4proc.c     instead of fs/nfs/nfs4xdr.c, aka     CID-b4487b935452.(CVE-2020-25212)

  - A flaw was found in the Linux kernel before 5.9-rc4. A     failure of the file system metadata validator in XFS     can cause an inode with a valid, user-creatable     extended attribute to be flagged as corrupt. This can     lead to the filesystem being shutdown, or otherwise     rendered inaccessible until it is remounted, leading to     a denial of service. The highest threat from this     vulnerability is to system     availability.(CVE-2020-14385)

  - In uvc_scan_chain_forward of uvc_driver.c, there is a     possible linked list corruption due to an unusual root     cause. This could lead to local escalation of privilege     in the kernel with no additional execution privileges     needed. User interaction is not needed for     exploitation.Product: AndroidVersions: Android     kernelAndroid ID: A-111893654References: Upstream     kernel(CVE-2020-0404)

  - The rbd block device driver in drivers/block/rbd.c in     the Linux kernel through 5.8.9 used incomplete     permission checking for access to rbd devices, which     could be leveraged by local attackers to map or unmap     rbd block devices, aka     CID-f44d04e696fe.(CVE-2020-25284)

  - A memory out-of-bounds read flaw was found in the Linux     kernel before 5.9-rc2 with the ext3/ext4 file system,     in the way it accesses a directory with broken     indexing. This flaw allows a local user to crash the     system if the directory exists. The highest threat from     this vulnerability is to system     availability.(CVE-2020-14314)

  - A flaw null pointer dereference in the Linux kernel     cgroupv2 subsystem in versions before 5.7.10 was found     in the way when reboot the system. A local user could     use this flaw to crash the system or escalate their     privileges on the system.(CVE-2020-24394)

  - A flaw was found in the Linux kernel's implementation     of the invert video code on VGA consoles when a local     attacker attempts to resize the console, calling an     ioctl VT_RESIZE, which causes an out-of-bounds write to     occur. This flaw allows a local user with access to the     VGA console to crash the system, potentially escalating     their privileges on the system. The highest threat from     this vulnerability is to data confidentiality and     integrity as well as system     availability.(CVE-2020-14331)

  - The Linux kernel, as used in Red Hat Enterprise Linux     7, kernel-rt, and Enterprise MRG 2 and when booted with     UEFI Secure Boot enabled, allows local users to bypass     intended securelevel/secureboot restrictions by     leveraging improper handling of secure_boot flag across     kexec reboot.(CVE-2015-7837)

  - In the Linux kernel through 5.8.7, local attackers able     to inject conntrack netlink configuration could     overflow a local buffer, causing crashes or triggering     use of incorrect protocol numbers in     ctnetlink_parse_tuple_filter in     net/netfilter/nf_conntrack_netlink.c, aka     CID-1cc5ef91d2ff.(CVE-2020-25211)

  - A flaw null pointer dereference in the Linux kernel     cgroupv2 subsystem in versions before 5.7.10 was found     in the way when reboot the system. A local user could     use this flaw to crash the system or escalate their     privileges on the system.(CVE-2020-14356)

  - Buffer overflow in i40e driver for Intel(R) Ethernet     700 Series Controllers versions before 7.0 may allow an     authenticated user to potentially enable an escalation     of privilege via local access.(CVE-2019-0145)

  - The Linux kernel through 5.7.11 allows remote attackers     to make observations that help to obtain sensitive     information about the internal state of the network     RNG, aka CID-f227e3ec3b5c. This is related to     drivers/char/random.c and     kernel/time/timer.c.(CVE-2020-16166)

  - The VFIO PCI driver in the Linux kernel through 5.6.13     mishandles attempts to access disabled memory     space.(CVE-2020-12888)

  - In the Linux kernel through 5.7.6, usbtest_disconnect     in drivers/usb/misc/usbtest.c has a memory leak, aka     CID-28ebeb8db770.(CVE-2020-15393)

  - A logic bug was found in the Linux kernels     implementation of SSBD. A bug in the logic handling can     allow an attacker with a local account to disable SSBD     protection during a context switch when additional     speculative execution mitigations are in     place.(CVE-2020-10766)

  - The prctl() function can be used to enable indirect     branch speculation even after it has been disabled.
    This same call will incorrectly report it being 'force     disabled' when it is not.(CVE-2020-10768)

  - A flaw was found in the Linux kernel's implementation     of the Enhanced IBPB (Indirect Branch Prediction     Barrier). The IBPB mitigation will be disabled when     STIBP is not available or when the Enhanced Indirect     Branch Restricted Speculation (IBRS) is available. This     flaw allows a local attacker to perform a Spectre V2     style attack when this configuration is active. The     highest threat from this vulnerability is to     confidentiality.(CVE-2020-10767)

  - A flaw was found in the ZRAM kernel module, where a     user with a local account and the ability to read the     /sys/class/zram-control/hot_add file can create ZRAM     device nodes in the /dev/ directory. This read     allocates kernel memory and is not accounted for a user     that triggers the creation of that ZRAM device. With     this vulnerability, continually reading the device may     consume a large amount of system memory and cause the     Out-of-Memory (OOM) killer to activate and terminate     random userspace processes, possibly making the system     inoperable.(CVE-2020-10781)

  - A flaw was found in the Linux kernel. An index buffer     overflow during Direct IO write leading to the NFS     client to crash. In some cases, a reach out of the     index after one memory allocation by kmalloc will cause     a kernel panic. The highest threat from this     vulnerability is to data confidentiality and system     availability.(CVE-2020-10742)

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-4752-1 advisory.

  - Legacy pairing and secure-connections pairing authentication in Bluetooth BR/EDR Core Specification v5.2     and earlier may allow an unauthenticated user to complete authentication without pairing credentials via     adjacent access. An unauthenticated, adjacent attacker could impersonate a Bluetooth BR/EDR master or     slave to pair with a previously paired remote device to successfully complete the authentication procedure     without knowing the link key. (CVE-2020-10135)

  - A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file     system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash     the system if the directory exists. The highest threat from this vulnerability is to system availability.
    (CVE-2020-14314)

  - Use-after-free vulnerability in fs/block_dev.c in the Linux kernel before 5.8 allows local users to gain     privileges or cause a denial of service by leveraging improper access to a certain error field.
    (CVE-2020-15436)

  - The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in     drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial     of service by using the p->serial_in pointer which uninitialized. (CVE-2020-15437)

  - Improper buffer restrictions in BlueZ may allow an unauthenticated user to potentially enable denial of     service via adjacent access. This affects all Linux kernel versions that support BlueZ. (CVE-2020-24490)

  - A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers     to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c     instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452. (CVE-2020-25212)

  - The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete     permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap     rbd block devices, aka CID-f44d04e696fe. (CVE-2020-25284)

  - A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length     biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a     denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block     device, resulting in a denial of service. The highest threat from this vulnerability is to system     availability. (CVE-2020-25641)

  - A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption     and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause     the system to crash or cause a denial of service. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25643)

  - A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using     PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of     service. (CVE-2020-25704)

  - An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before     5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering,     aka CID-77377064c3a9. (CVE-2020-27152)

  - A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the     ability to set extended attributes to panic the system, causing memory corruption or escalating     privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-27815)

  - An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1     Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit     631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it's likely that all     versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability,     which leads to the kernel leaking memory contents. (CVE-2020-28588)

  - A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be     used by local attackers to read kernel memory, aka CID-6735b4632def. (CVE-2020-28915)

  - An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The     copy-on-write implementation can grant unintended write access because of a race condition in a THP     mapcount check, aka CID-c444eb564fb1. (CVE-2020-29368)

  - An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between     certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an     munmap call, aka CID-246c320a8cfe. (CVE-2020-29369)

  - An issue was discovered in romfs_dev_read in fs/romfs/storage.c in the Linux kernel before 5.8.4.
    Uninitialized memory leaks to userspace, aka CID-bcf85fcedfdd. (CVE-2020-29371)

  - A locking inconsistency issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may allow a read-after-free attack against TIOCGSID,     aka CID-c8bcd9c5be24. (CVE-2020-29660)

  - A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.
    (CVE-2020-29661)

  - A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux     kernel child/parent process identification handling while filtering signal handlers. A local attacker is     able to abuse this flaw to bypass checks to send any signal to a privileged process. (CVE-2020-35508)

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

ID	Name	Product	Family	Published	Updated	Severity
143411	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2020-2498)	Nessus	Huawei Local Security Checks	12/1/2020	2/7/2024	medium
143314	openSUSE Security Update : the Linux Kernel (openSUSE-2020-2034)	Nessus	SuSE Local Security Checks	11/30/2020	2/7/2024	high
151857	RHEL 8 : kernel (RHSA-2021:2718)	Nessus	Red Hat Local Security Checks	7/21/2021	4/28/2024	high
147512	EulerOS Virtualization 2.9.1 : kernel (EulerOS-SA-2021-1604)	Nessus	Huawei Local Security Checks	3/10/2021	2/9/2023	critical
147982	Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4752-1)	Nessus	Ubuntu Local Security Checks	3/23/2021	1/9/2024	high
164601	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.20.4)	Nessus	Misc.	9/1/2022	3/25/2024	critical

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