USN-3189-1: Linux kernel vulnerabilities

03 February 2017

Several security issues were fixed in the kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-raspi2 - Linux kernel for Raspberry Pi 2
  • linux-snapdragon - Linux kernel for Snapdragon Processors

Details

Mikulas Patocka discovered that the asynchronous multibuffer cryptographic
daemon (mcryptd) in the Linux kernel did not properly handle being invoked
with incompatible algorithms. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-10147)

Qidan He discovered that the ICMP implementation in the Linux kernel did
not properly check the size of an ICMP header. A local attacker with
CAP_NET_ADMIN could use this to expose sensitive information.
(CVE-2016-8399)

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.

Related notices

  • USN-3190-2: linux-image-raspi2, linux-raspi2, linux-image-4.8.0-1024-raspi2
  • USN-3189-2: linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc-smp-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-62-generic-lpae, linux-image-powerpc64-smp-lts-xenial, linux-image-4.4.0-62-powerpc-smp, linux-image-lowlatency-lts-xenial, linux-image-generic-lts-xenial, linux-image-4.4.0-62-generic, linux-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-62-powerpc-e500mc, linux-image-4.4.0-62-lowlatency, linux-image-4.4.0-62-powerpc64-smp, linux-image-4.4.0-62-powerpc64-emb
  • USN-3190-1: linux-image-4.8.0-37-powerpc-e500mc, linux-image-powerpc-e500mc, linux-image-generic-lpae, linux-image-4.8.0-37-generic, linux, linux-image-powerpc64-emb, linux-image-4.8.0-37-powerpc-smp, linux-image-lowlatency, linux-image-4.8.0-37-generic-lpae, linux-image-4.8.0-37-powerpc64-emb, linux-image-4.8.0-37-lowlatency, linux-image-powerpc-smp, linux-image-generic