USN-3218-1: Linux kernel vulnerability
7 March 2017
linux, linux-ti-omap4 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
The system could be made to crash or run programs as an administrator.
- linux - Linux kernel
- linux-ti-omap4 - Linux kernel for OMAP4
Alexander Popov discovered that the N_HDLC line discipline implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges.
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 12.04 LTS
- linux-image-3.2.0-124-generic - 3.2.0-124.167
- linux-image-3.2.0-124-generic-pae - 3.2.0-124.167
- linux-image-3.2.0-124-highbank - 3.2.0-124.167
- linux-image-3.2.0-124-omap - 3.2.0-124.167
- linux-image-3.2.0-124-powerpc-smp - 3.2.0-124.167
- linux-image-3.2.0-124-powerpc64-smp - 3.2.0-124.167
- linux-image-3.2.0-124-virtual - 3.2.0-124.167
- linux-image-3.2.0-1502-omap4 - 3.2.0-1502.129
- linux-image-generic - 184.108.40.206.139
- linux-image-generic-pae - 220.127.116.11.139
- linux-image-highbank - 18.104.22.168.139
- linux-image-omap - 22.214.171.124.139
- linux-image-omap4 - 126.96.36.1992.97
- linux-image-powerpc-smp - 188.8.131.52.139
- linux-image-powerpc64-smp - 184.108.40.206.139
- linux-image-virtual - 220.127.116.11.139
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.