USN-3509-1: Linux kernel vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-kvm - Linux kernel for cloud environments
• linux-raspi2 - Linux kernel for Raspberry Pi 2
• linux-snapdragon - Linux kernel for Snapdragon processors

Details

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

Fan Wu, Haoran Qiu, and Shixiong Zhao discovered that the associative array
implementation in the Linux kernel sometimes did not properly handle adding
a new entry. A local attacker could use this to cause a denial of service
(system crash). (CVE-2017-12193)

Andrey Konovalov discovered an out-of-bounds read in the GTCO digitizer USB
driver for the Linux kernel. A physically proximate attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-16643)

Update instructions

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

Ubuntu 16.04

• linux-image-4.4.0-1012-kvm - 4.4.0-1012.17
• linux-image-4.4.0-103-generic - 4.4.0-103.126
• linux-image-4.4.0-103-generic-lpae - 4.4.0-103.126
• linux-image-4.4.0-103-lowlatency - 4.4.0-103.126
• linux-image-4.4.0-103-powerpc-e500mc - 4.4.0-103.126
• linux-image-4.4.0-103-powerpc-smp - 4.4.0-103.126
• linux-image-4.4.0-103-powerpc64-emb - 4.4.0-103.126
• linux-image-4.4.0-103-powerpc64-smp - 4.4.0-103.126
• linux-image-4.4.0-1043-aws - 4.4.0-1043.52
• linux-image-4.4.0-1079-raspi2 - 4.4.0-1079.87
• linux-image-4.4.0-1081-snapdragon - 4.4.0-1081.86

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-2017-1000405
• CVE-2017-12193
• CVE-2017-16643
• CVE-2017-16939

Related notices

• USN-3510-1: linux-image-extra-3.13.0-137-generic, linux-image-3.13.0-137-lowlatency, linux-image-3.13.0-137-powerpc-e500, linux-image-3.13.0-137-generic, linux-image-3.13.0-137-powerpc64-emb, linux-image-3.13.0-137-powerpc-smp, linux-image-3.13.0-137-generic-lpae, linux-image-3.13.0-137-powerpc-e500mc, linux, linux-image-3.13.0-137-powerpc64-smp
• USN-3510-2: linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-137-generic, linux-image-3.13.0-137-generic-lpae, linux-lts-trusty
• USN-3511-1: linux-image-extra-4.11.0-1016-azure, linux-azure, linux-image-4.11.0-1016-azure
• USN-3507-1: linux-image-4.13.0-19-generic, linux-image-4.13.0-1008-raspi2, linux-image-4.13.0-19-lowlatency, linux-image-generic, linux-raspi2, linux-image-4.13.0-19-generic-lpae, linux-image-raspi2, linux, linux-image-generic-lpae, linux-image-lowlatency
• USN-3508-2: linux-image-4.10.0-42-lowlatency, linux-image-4.10.0-42-generic, linux-hwe, linux-image-extra-4.10.0-42-generic, linux-image-4.10.0-42-generic-lpae
• USN-3507-2: linux-image-4.13.0-1002-gcp, linux-gcp, linux-image-extra-4.13.0-1002-gcp
• USN-3509-2: linux-aws, linux-image-4.4.0-1005-aws, linux-image-4.4.0-103-lowlatency, linux-image-4.4.0-103-powerpc64-smp, linux-image-4.4.0-103-generic, linux-image-4.4.0-103-powerpc-smp, linux-lts-xenial, linux-image-4.4.0-103-powerpc-e500mc, linux-image-4.4.0-103-powerpc64-emb, linux-image-extra-4.4.0-103-generic, linux-image-4.4.0-103-generic-lpae
• USN-3508-1: linux-image-4.10.0-1023-raspi2, linux-image-4.10.0-42-lowlatency, linux-image-4.10.0-42-generic, linux-image-generic, linux-raspi2, linux-image-4.10.0-42-generic-lpae, linux-image-raspi2, linux, linux-image-generic-lpae, linux-image-lowlatency
• USN-3698-2: linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-153-generic, linux-lts-trusty, linux-image-3.13.0-153-generic-lpae
• USN-3698-1: linux-image-3.13.0-153-powerpc64-smp, linux-image-extra-3.13.0-153-generic, linux-image-3.13.0-153-powerpc-e500, linux-image-3.13.0-153-powerpc-smp, linux-image-3.13.0-153-generic, linux-image-3.13.0-153-powerpc64-emb, linux-image-3.13.0-153-lowlatency, linux-image-3.13.0-153-powerpc-e500mc, linux, linux-image-3.13.0-153-generic-lpae
• USN-3754-1: linux-image-3.13.0-157-generic, linux-image-3.13.0-157-powerpc64-smp, linux-image-3.13.0-157-generic-lpae, linux-image-extra-3.13.0-157-generic, linux-image-3.13.0-157-lowlatency, linux-image-3.13.0-157-powerpc64-emb, linux-image-3.13.0-157-powerpc-e500, linux-image-3.13.0-157-powerpc-smp, linux, linux-image-3.13.0-157-powerpc-e500mc