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USN-3161-1: Linux kernel vulnerabilities

20 December 2016

Several security issues were fixed in the kernel.

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Releases

Packages

Details

Tilman Schmidt and Sasha Levin discovered a use-after-free condition in the
TTY implementation in the Linux kernel. A local attacker could use this to
expose sensitive information (kernel memory). (CVE-2015-8964)

It was discovered that the Video For Linux Two (v4l2) implementation in the
Linux kernel did not properly handle multiple planes when processing a
VIDIOC_DQBUF ioctl(). A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2016-4568)

CAI Qian discovered that shared bind mounts in a mount namespace
exponentially added entries without restriction to the Linux kernel's mount
table. A local attacker could use this to cause a denial of service (system
crash). (CVE-2016-6213)

It was discovered that the KVM implementation for x86/x86_64 in the Linux
kernel could dereference a null pointer. An attacker in a guest virtual
machine could use this to cause a denial of service (system crash) in the
KVM host. (CVE-2016-8630)

Eyal Itkin discovered that the IP over IEEE 1394 (FireWire) implementation
in the Linux kernel contained a buffer overflow when handling fragmented
packets. A remote attacker could use this to possibly execute arbitrary
code with administrative privileges. (CVE-2016-8633)

Marco Grassi discovered that the TCP implementation in the Linux kernel
mishandles socket buffer (skb) truncation. A local attacker could use this
to cause a denial of service (system crash). (CVE-2016-8645)

Andrey Konovalov discovered that the SCTP implementation in the Linux
kernel improperly handled validation of incoming data. A remote attacker
could use this to cause a denial of service (system crash). (CVE-2016-9555)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 16.04

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

Related notices

  • USN-3161-4: linux-image-4.4.0-1042-snapdragon, linux-snapdragon
  • USN-3161-3: linux-raspi2, linux-image-4.4.0-1038-raspi2
  • USN-3161-2: linux-image-4.4.0-57-powerpc-e500mc, linux-image-4.4.0-57-powerpc64-emb, linux-image-4.4.0-57-generic-lpae, linux-image-4.4.0-57-lowlatency, linux-lts-xenial, linux-image-4.4.0-57-powerpc64-smp, linux-image-extra-4.4.0-57-generic, linux-image-4.4.0-57-powerpc-smp, linux-image-4.4.0-57-generic
  • USN-3360-1: linux-image-3.13.0-125-generic, linux, linux-image-3.13.0-125-powerpc-e500mc, linux-image-3.13.0-125-powerpc64-emb, linux-image-3.13.0-125-powerpc-e500, linux-image-3.13.0-125-lowlatency, linux-image-3.13.0-125-generic-lpae, linux-image-3.13.0-125-powerpc-smp, linux-image-3.13.0-125-powerpc64-smp, linux-image-extra-3.13.0-125-generic
  • USN-3360-2: linux-image-3.13.0-125-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-125-generic-lpae, linux-image-generic-lts-trusty
  • USN-3162-2: linux-raspi2, linux-image-raspi2, linux-image-4.8.0-1021-raspi2
  • USN-3162-1: linux-image-powerpc-smp, linux-image-4.8.0-32-powerpc-e500mc, linux-image-4.8.0-32-generic, linux-image-generic, linux-image-powerpc-e500mc, linux, linux-image-4.8.0-32-lowlatency, linux-image-4.8.0-32-powerpc-smp, linux-image-generic-lpae, linux-image-powerpc64-emb, linux-image-lowlatency, linux-image-4.8.0-32-generic-lpae, linux-image-4.8.0-32-powerpc64-emb
  • USN-3160-2: linux-lts-trusty, linux-image-3.13.0-106-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-106-generic, linux-image-generic-lts-trusty
  • USN-3160-1: linux-image-3.13.0-106-powerpc64-smp, linux-image-extra-3.13.0-106-generic, linux-image-3.13.0-106-powerpc64-emb, linux, linux-image-3.13.0-106-powerpc-e500, linux-image-3.13.0-106-generic-lpae, linux-image-3.13.0-106-powerpc-smp, linux-image-3.13.0-106-lowlatency, linux-image-3.13.0-106-generic, linux-image-3.13.0-106-powerpc-e500mc
  • USN-3445-1: linux-image-3.13.0-133-powerpc64-smp, linux-image-extra-3.13.0-133-generic, linux, linux-image-3.13.0-133-powerpc-e500, linux-image-3.13.0-133-powerpc64-emb, linux-image-3.13.0-133-generic-lpae, linux-image-3.13.0-133-lowlatency, linux-image-3.13.0-133-generic, linux-image-3.13.0-133-powerpc-e500mc, linux-image-3.13.0-133-powerpc-smp
  • USN-3445-2: linux-lts-trusty, linux-image-3.13.0-133-generic-lpae, linux-image-3.13.0-133-generic, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty
  • USN-3290-1: linux-image-3.13.0-119-powerpc64-emb, linux-image-extra-3.13.0-119-generic, linux-image-3.13.0-119-lowlatency, linux, linux-image-3.13.0-119-generic-lpae, linux-image-3.13.0-119-powerpc-e500, linux-image-3.13.0-119-generic, linux-image-3.13.0-119-powerpc64-smp, linux-image-3.13.0-119-powerpc-smp, linux-image-3.13.0-119-powerpc-e500mc
  • USN-3187-1: linux-image-powerpc-smp, linux-image-generic, linux-image-virtual, linux, linux-image-generic-pae, linux-image-powerpc64-smp, linux-image-3.2.0-121-powerpc-smp, linux-image-highbank, linux-image-3.2.0-121-omap, linux-image-3.2.0-121-powerpc64-smp, linux-image-3.2.0-121-highbank, linux-image-3.2.0-121-virtual, linux-image-omap, linux-image-3.2.0-121-generic, linux-image-3.2.0-121-generic-pae
  • USN-3187-2: linux-ti-omap4, linux-image-3.2.0-1499-omap4, linux-image-omap4
  • USN-3188-1: linux-image-3.13.0-108-generic, linux-image-3.13.0-108-lowlatency, linux, linux-image-3.13.0-108-powerpc-smp, linux-image-3.13.0-108-generic-lpae, linux-image-3.13.0-108-powerpc64-emb, linux-image-extra-3.13.0-108-generic, linux-image-3.13.0-108-powerpc-e500mc, linux-image-3.13.0-108-powerpc-e500, linux-image-3.13.0-108-powerpc64-smp
  • USN-3188-2: linux-image-3.13.0-108-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-108-generic-lpae, linux-image-generic-lts-trusty

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Further reading