USN-3250-1: Linux kernel vulnerability
29 March 2017
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
The system could be made to crash or run programs as an administrator.
- linux - Linux kernel
It was discovered that the xfrm framework for transforming packets in the Linux kernel did not properly validate data received from user space. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code with administrative privileges.
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 14.04 LTS
- linux-image-3.13.0-115-generic - 3.13.0-115.162
- linux-image-3.13.0-115-generic-lpae - 3.13.0-115.162
- linux-image-3.13.0-115-lowlatency - 3.13.0-115.162
- linux-image-3.13.0-115-powerpc-e500 - 3.13.0-115.162
- linux-image-3.13.0-115-powerpc-e500mc - 3.13.0-115.162
- linux-image-3.13.0-115-powerpc-smp - 3.13.0-115.162
- linux-image-3.13.0-115-powerpc64-smp - 3.13.0-115.162
- linux-image-generic - 188.8.131.52.125
- linux-image-generic-lpae - 184.108.40.206.125
- linux-image-lowlatency - 220.127.116.11.125
- linux-image-powerpc-e500 - 18.104.22.168.125
- linux-image-powerpc-e500mc - 22.214.171.124.125
- linux-image-powerpc-smp - 126.96.36.199.125
- linux-image-powerpc64-smp - 188.8.131.52.125
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.