Race condition in kernel/ucount.c in the Linux kernel through 4.10.2 allows local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via crafted system calls that leverage certain decrement behavior that causes incorrect interaction between put_ucounts and get_ucounts.

An update of the linux package has been released.

According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - The NFSv2 and NFSv3 server implementations in the Linux     kernel through 4.10.13 lacked certain checks for the     end of a buffer. A remote attacker could trigger a     pointer-arithmetic error or possibly cause other     unspecified impacts using crafted requests related to     fs/nfsd/nfs3xdr.c and     fs/nfsd/nfsxdr.c.(CVE-2017-7895i1/4%0

  - A flaw was found in the Linux kernel's ACPI subsystem     where a function does not flush the operand cache and     causes a kernel stack dump. This allows local users to     obtain sensitive information from kernel memory and     bypass the KASLR protection mechanism when using a     specially crafted ACPI table.(CVE-2017-13695i1/4%0

  - It was found that fanout_add() in     'net/packet/af_packet.c' in the Linux kernel, before     version 4.13.6, allows local users to gain privileges     via crafted system calls that trigger mishandling of     packet_fanout data structures, because of a race     condition (involving fanout_add and packet_do_bind)     that leads to a use-after-free bug.(CVE-2017-15649i1/4%0

  - Race condition in kernel/ucount.c in the Linux kernel     through 4.10.2 allows local users to cause a denial of     service (use-after-free and system crash) or possibly     have unspecified other impact via crafted system calls     that leverage certain decrement behavior that causes     incorrect interaction between put_ucounts and     get_ucounts.(CVE-2017-6874i1/4%0

  - An out-of-bounds memory access flaw, CVE-2014-7825, was     found in the syscall tracing functionality of the Linux     kernel's perf subsystem. A local, unprivileged user     could use this flaw to crash the system. Additionally,     an out-of-bounds memory access flaw, CVE-2014-7826, was     found in the syscall tracing functionality of the Linux     kernel's ftrace subsystem. On a system with ftrace     syscall tracing enabled, a local, unprivileged user     could use this flaw to crash the system, or escalate     their privileges.(CVE-2014-7825i1/4%0

  - The Salsa20 encryption algorithm in the Linux kernel,     before 4.14.8, does not correctly handle zero-length     inputs. This allows a local attacker the ability to use     the AF_ALG-based skcipher interface to cause a denial     of service (uninitialized-memory free and kernel crash)     or have an unspecified other impact by executing a     crafted sequence of system calls that use the     blkcipher_walk API. Both the generic implementation     (crypto/salsa20_generic.c) and x86 implementation     (arch/x86/crypto/salsa20_glue.c) of Salsa20 are     vulnerable.(CVE-2017-17805i1/4%0

  - The msm_ipc_router_bind_control_port function in     net/ipc_router/ipc_router_core.c in the IPC router     kernel module for the Linux kernel 3.x, as used in     Qualcomm Innovation Center (QuIC) Android contributions     for MSM devices and other products, does not verify     that a port is a client port, which allows attackers to     gain privileges or cause a denial of service (race     condition and list corruption) by making many     BIND_CONTROL_PORT ioctl calls.(CVE-2016-2059i1/4%0

  - The do_remount function in fs/namespace.c in the Linux     kernel through 3.16.1 does not maintain the     MNT_LOCK_READONLY bit across a remount of a bind mount,     which allows local users to bypass an intended     read-only restriction and defeat certain sandbox     protection mechanisms via a 'mount -o remount' command     within a user namespace.(CVE-2014-5206i1/4%0

  - The ati_remote2_probe function in     drivers/input/misc/ati_remote2.c in the Linux kernel     before 4.5.1 allows physically proximate attackers to     cause a denial of service (NULL pointer dereference and     system crash) via a crafted endpoints value in a USB     device descriptor.(CVE-2016-2185i1/4%0

  - It was found that the fix for CVE-2014-3601 was     incomplete: the Linux kernel's kvm_iommu_map_pages()     function still handled IOMMU mapping failures     incorrectly. A privileged user in a guest with an     assigned host device could use this flaw to crash the     host.(CVE-2014-8369i1/4%0

  - A NULL pointer dereference was found in     net/rds/rdma.c:__rds_rdma_map() function in the Linux     kernel allowing local attackers to cause a system panic     and a denial-of-service.(CVE-2018-7492i1/4%0

  - An issue was discovered in the XFS filesystem in     fs/xfs/xfs_icache.c in the Linux kernel. There is a     NULL pointer dereference leading to a system panic in     lookup_slow() on a NULL inode-i1/4zi_ops pointer when     doing pathwalks on a corrupted xfs image. This occurs     because of a lack of proper validation that cached     inodes are free during an allocation.(CVE-2018-13093i1/4%0

  - The iowarrior_probe function in     drivers/usb/misc/iowarrior.c in the Linux kernel before     4.5.1 allows physically proximate attackers to cause a     denial of service (NULL pointer dereference and system     crash) via a crafted endpoints value in a USB device     descriptor.(CVE-2016-2188i1/4%0

  - Linux kernel built with the 802.1Q/802.1ad     VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local     Area Network(CONFIG_VXLAN) with Transparent Ethernet     Bridging(TEB) GRO support, is vulnerable to a stack     overflow issue. It could occur while receiving large     packets via GRO path, as an unlimited recursion could     unfold in both VLAN and TEB modules, leading to a stack     corruption in the kernel.(CVE-2016-7039i1/4%0

  - The msr_mtrr_valid function in arch/x86/kvm/mtrr.c in     the Linux kernel before 4.6.1 supports MSR 0x2f8, which     allows guest OS users to read or write to the     kvm_arch_vcpu data structure, and consequently obtain     sensitive information or cause a denial of service     (system crash), via a crafted ioctl     call.(CVE-2016-3713i1/4%0

  - A flaw was found in the way the Linux kernel's VFS     subsystem handled reference counting when performing     unmount operations on symbolic links. A local,     unprivileged user could use this flaw to exhaust all     available memory on the system or, potentially, trigger     a use-after-free error, resulting in a system crash or     privilege escalation.(CVE-2014-5045i1/4%0

  - The KEYS subsystem in the Linux kernel before 4.13.10     does not correctly synchronize the actions of updating     versus finding a key in the 'negative' state to avoid a     race condition, which allows local users to cause a     denial of service or possibly have unspecified other     impact via crafted system calls.(CVE-2017-15951i1/4%0

  - The skb_flow_dissect function in     net/core/flow_dissector.c in the Linux kernel through     3.12 allows remote attackers to cause a denial of     service (infinite loop) via a small value in the IHL     field of a packet with IPIP     encapsulation.(CVE-2013-4348i1/4%0

  - The Linux kernel through 3.17.4 does not properly     restrict dropping of supplemental group memberships in     certain namespace scenarios, which allows local users     to bypass intended file permissions by leveraging a     POSIX ACL containing an entry for the group category     that is more restrictive than the entry for the other     category, aka a 'negative groups' issue, related to     kernel/groups.c, kernel/uid16.c, and     kernel/user_namespace.c.(CVE-2014-8989i1/4%0

  - An infinite-loop flaw was found in the kernel. When a     local user calls the sys_writev syscall with a     specially crafted sequence of iov structs, the     fuse_fill_write_pages kernel function might never     terminate, instead continuing in a tight loop. This     process cannot be terminated and requires a     reboot.(CVE-2015-8785i1/4%0

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 4.9.17 update contains a number of important fixes across the tree

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The 4.9.16 update contains a number of important fixes across the tree

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The 4.9.15 update contains a number of important fixes across the tree

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The 4.9.14 update contains a number of important fixes across the tree.

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

The 4.10.5 stable kernel update contains a number of important fixes across the tree.

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The 4.10.4 stable kernel update contains a number of important fixes across the tree. It also reverts CONFIG_CFG80211_CRDA_SUPPORT to match the previous 4.9 kernels.

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The 4.10.3 kernel rebase contains a number of new features, important fixes, and additional hardware support.

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

ID	Name	Product	Family	Severity
203055	Photon OS 1.0: Linux PHSA-2017-0008	Nessus	PhotonOS Local Security Checks	high
124974	EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1521)	Nessus	Huawei Local Security Checks	critical
99051	Fedora 24 : kernel (2017-15fbaf2450)	Nessus	Fedora Local Security Checks	high
99010	Fedora 25 : kernel (2017-90aaa5bd24)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2017-6874

high

Tenable Plugins

high

critical

high

high