USN-3312-1: Linux kernel vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-gke - Linux kernel for Google Container Engine (GKE) systems
• linux-raspi2 - Linux kernel for Raspberry Pi 2
• linux-snapdragon - Linux kernel for Snapdragon Processors

Details

It was discovered that the netfilter netlink implementation in the Linux
kernel did not properly validate batch messages. A local attacker with the
CAP_NET_ADMIN capability could use this to expose sensitive information or
cause a denial of service. (CVE-2016-7917)

Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build()
function in the Linux kernel. A local attacker could use to cause a denial
of service (system crash) or possibly execute arbitrary code with
administrative privileges. (CVE-2016-8632)

It was discovered that the keyring implementation in the Linux kernel in
some situations did not prevent special internal keyrings from being joined
by userspace keyrings. A privileged local attacker could use this to bypass
module verification. (CVE-2016-9604)

It was discovered that a buffer overflow existed in the trace subsystem in
the Linux kernel. A privileged local attacker could use this to execute
arbitrary code. (CVE-2017-0605)

Dmitry Vyukov discovered that KVM implementation in the Linux kernel
improperly emulated the VMXON instruction. A local attacker in a guest OS
could use this to cause a denial of service (memory consumption) in the
host OS. (CVE-2017-2596)

Daniel Jiang discovered that a race condition existed in the ipv4 ping
socket implementation in the Linux kernel. A local privileged attacker
could use this to cause a denial of service (system crash). (CVE-2017-2671)

Di Shen discovered that a race condition existed in the perf subsystem of
the Linux kernel. A local attacker could use this to cause a denial of
service or possibly gain administrative privileges. (CVE-2017-6001)

Eric Biggers discovered a memory leak in the keyring implementation in the
Linux kernel. A local attacker could use this to cause a denial of service
(memory consumption). (CVE-2017-7472)

Sabrina Dubroca discovered that the asynchronous cryptographic hash (ahash)
implementation in the Linux kernel did not properly handle a full request
queue. A local attacker could use this to cause a denial of service
(infinite recursion). (CVE-2017-7618)

Tuomas Haanpää and Ari Kauppi discovered that the NFSv2 and NFSv3 server
implementations in the Linux kernel did not properly handle certain long
RPC replies. A remote attacker could use this to cause a denial of service
(system crash). (CVE-2017-7645)

Tommi Rantala and Brad Spengler discovered that the memory manager in the
Linux kernel did not properly enforce the CONFIG_STRICT_DEVMEM protection
mechanism. A local attacker with access to /dev/mem could use this to
expose sensitive information or possibly execute arbitrary code.
(CVE-2017-7889)

Tuomas Haanpää and Ari Kauppi discovered that the NFSv2 and NFSv3 server
implementations in the Linux kernel did not properly check for the end of
buffer. A remote attacker could use this to craft requests that cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2017-7895)

It was discovered that a use-after-free vulnerability existed in the device
driver for XCeive xc2028/xc3028 tuners in the Linux kernel. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-7913)

Vlad Tsyrklevich discovered an integer overflow vulnerability in the VFIO
PCI driver for the Linux kernel. A local attacker with access to a vfio PCI
device file could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2016-9083, CVE-2016-9084)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04

• linux-image-4.4.0-1014-gke - 4.4.0-1014.14
• linux-image-4.4.0-1018-aws - 4.4.0-1018.27
• linux-image-4.4.0-1057-raspi2 - 4.4.0-1057.64
• linux-image-4.4.0-1059-snapdragon - 4.4.0-1059.63
• linux-image-4.4.0-79-generic - 4.4.0-79.100
• linux-image-4.4.0-79-generic-lpae - 4.4.0-79.100
• linux-image-4.4.0-79-lowlatency - 4.4.0-79.100
• linux-image-4.4.0-79-powerpc-e500mc - 4.4.0-79.100
• linux-image-4.4.0-79-powerpc-smp - 4.4.0-79.100
• linux-image-4.4.0-79-powerpc64-smp - 4.4.0-79.100

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

• CVE-2016-7913
• CVE-2016-7917
• CVE-2016-8632
• CVE-2016-9083
• CVE-2016-9084
• CVE-2016-9604
• CVE-2017-0605
• CVE-2017-2596
• CVE-2017-2671
• CVE-2017-6001
• CVE-2017-7472
• CVE-2017-7618
• CVE-2017-7645
• CVE-2017-7889
• CVE-2017-7895

Related notices

• USN-3798-1: linux-image-3.13.0-161-powerpc-e500mc, linux-image-3.13.0-161-generic, linux, linux-image-extra-3.13.0-161-generic, linux-image-3.13.0-161-powerpc-smp, linux-image-3.13.0-161-powerpc-e500, linux-image-3.13.0-161-powerpc64-emb, linux-image-3.13.0-161-powerpc64-smp, linux-image-3.13.0-161-lowlatency, linux-image-3.13.0-161-generic-lpae
• USN-3798-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-161-generic, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-161-generic-lpae
• USN-3312-2: linux-image-4.4.0-79-generic, linux-image-extra-4.4.0-79-generic, linux-image-4.4.0-79-generic-lpae, linux-image-4.4.0-79-powerpc-smp, linux-image-4.4.0-79-powerpc-e500mc, linux-lts-xenial, linux-image-4.4.0-79-powerpc64-smp, linux-image-4.4.0-79-lowlatency, linux-image-4.4.0-79-powerpc64-emb
• USN-3190-1: linux-image-4.8.0-37-powerpc-smp, linux-image-4.8.0-37-generic, linux, linux-image-powerpc-e500mc, linux-image-4.8.0-37-powerpc64-emb, linux-image-lowlatency, linux-image-powerpc64-emb, linux-image-4.8.0-37-powerpc-e500mc, linux-image-4.8.0-37-lowlatency, linux-image-generic, linux-image-generic-lpae, linux-image-powerpc-smp, linux-image-4.8.0-37-generic-lpae
• USN-3470-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-135-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-135-generic
• USN-3470-1: linux-image-3.13.0-135-lowlatency, linux-image-3.13.0-135-powerpc64-smp, linux, linux-image-3.13.0-135-generic-lpae, linux-image-3.13.0-135-powerpc64-emb, linux-image-3.13.0-135-powerpc-e500, linux-image-extra-3.13.0-135-generic, linux-image-3.13.0-135-powerpc-e500mc, linux-image-3.13.0-135-powerpc-smp, linux-image-3.13.0-135-generic
• USN-3190-2: linux-image-4.8.0-1024-raspi2, linux-image-raspi2, linux-raspi2
• USN-3361-1: linux-image-4.10.0-27-lowlatency, linux-image-4.10.0-27-generic-lpae, linux-hwe, linux-image-4.10.0-27-generic, linux-image-extra-4.10.0-27-generic
• USN-3422-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-132-generic, linux-image-3.13.0-132-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty
• USN-3422-1: linux-image-3.13.0-132-powerpc64-emb, linux-image-3.13.0-132-generic, linux-image-3.13.0-132-generic-lpae, linux-image-3.13.0-132-powerpc-e500mc, linux, linux-image-extra-3.13.0-132-generic, linux-image-3.13.0-132-powerpc64-smp, linux-image-3.13.0-132-lowlatency, linux-image-3.13.0-132-powerpc-e500, linux-image-3.13.0-132-powerpc-smp
• USN-3314-1: linux-image-4.10.0-1006-raspi2, linux, linux-image-4.10.0-22-lowlatency, linux-image-4.10.0-22-generic-lpae, linux-image-lowlatency, linux-image-generic, linux-image-generic-lpae, linux-image-4.10.0-22-generic, linux-raspi2, linux-image-raspi2
• USN-3313-2: linux-image-4.8.0-54-generic, linux-image-4.8.0-54-lowlatency, linux-hwe, linux-image-4.8.0-54-generic-lpae, linux-image-extra-4.8.0-54-generic
• USN-3343-1: linux-image-3.13.0-123-generic, linux-image-3.13.0-123-powerpc64-emb, linux-image-3.13.0-123-powerpc-smp, linux-image-extra-3.13.0-123-generic, linux, linux-image-3.13.0-123-powerpc-e500mc, linux-image-3.13.0-123-powerpc64-smp, linux-image-3.13.0-123-lowlatency, linux-image-3.13.0-123-powerpc-e500, linux-image-3.13.0-123-generic-lpae
• USN-3343-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-123-generic, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-123-generic-lpae
• USN-3313-1: linux-image-4.8.0-54-generic, linux-image-4.8.0-54-lowlatency, linux-image-4.8.0-1038-raspi2, linux, linux-image-powerpc-e500mc, linux-image-4.8.0-54-powerpc-smp, linux-image-4.8.0-54-powerpc-e500mc, linux-image-lowlatency, linux-image-4.8.0-54-generic-lpae, linux-image-powerpc-smp, linux-image-generic, linux-image-generic-lpae, linux-image-powerpc64-emb, linux-image-raspi2, linux-image-4.8.0-54-powerpc64-emb, linux-raspi2
• USN-3293-1: linux-image-4.10.0-21-generic-lpae, linux, linux-image-4.10.0-21-generic, linux-image-lowlatency, linux-image-4.10.0-21-lowlatency, linux-image-generic, linux-image-generic-lpae, linux-image-raspi2, linux-image-4.10.0-1005-raspi2, linux-raspi2
• USN-3754-1: linux-image-extra-3.13.0-157-generic, linux-image-3.13.0-157-powerpc64-smp, linux, linux-image-3.13.0-157-powerpc-e500mc, linux-image-3.13.0-157-generic-lpae, linux-image-3.13.0-157-lowlatency, linux-image-3.13.0-157-generic, linux-image-3.13.0-157-powerpc-e500, linux-image-3.13.0-157-powerpc64-emb, linux-image-3.13.0-157-powerpc-smp
• USN-3583-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-142-generic, linux-lts-trusty, linux-image-3.13.0-142-generic-lpae, linux-image-generic-lts-trusty
• USN-3583-1: linux-image-extra-3.13.0-142-generic, linux-image-3.13.0-142-generic, linux-image-3.13.0-142-powerpc-smp, linux, linux-image-3.13.0-142-powerpc64-smp, linux-image-3.13.0-142-powerpc-e500mc, linux-image-3.13.0-142-powerpc64-emb, linux-image-3.13.0-142-powerpc-e500, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-lowlatency
• USN-3359-1: linux-image-4.8.0-59-powerpc-smp, linux, linux-image-4.8.0-59-powerpc64-emb, linux-image-powerpc-e500mc, linux-image-4.8.0-59-lowlatency, linux-image-4.8.0-1043-raspi2, linux-image-lowlatency, linux-image-powerpc64-emb, linux-image-4.8.0-59-powerpc-e500mc, linux-image-generic, linux-image-generic-lpae, linux-image-4.8.0-59-generic, linux-image-4.8.0-59-generic-lpae, linux-image-powerpc-smp, linux-image-raspi2, linux-raspi2
• USN-3360-1: linux-image-3.13.0-125-powerpc64-smp, linux-image-3.13.0-125-powerpc-smp, linux, linux-image-3.13.0-125-powerpc-e500, linux-image-3.13.0-125-generic-lpae, linux-image-extra-3.13.0-125-generic, linux-image-3.13.0-125-powerpc64-emb, linux-image-3.13.0-125-lowlatency, linux-image-3.13.0-125-powerpc-e500mc, linux-image-3.13.0-125-generic
• USN-3360-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-125-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-125-generic