USN-3779-1: Linux kernel vulnerabilities
2 October 2018
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Several security issues were fixed in the Linux kernel.
- linux - Linux kernel
It was discovered that an integer overflow vulnerability existed in the Linux kernel when loading an executable to run. A local attacker could use this to gain administrative privileges. (CVE-2018-14634)
It was discovered that a stack-based buffer overflow existed in the iSCSI target implementation of the Linux kernel. A remote attacker could use this to cause a denial of service (system crash). (CVE-2018-14633)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 12.04 ESM
- linux-image-3.2.0-136-generic - 3.2.0-136.182
- linux-image-3.2.0-136-generic-pae - 3.2.0-136.182
- linux-image-3.2.0-136-highbank - 3.2.0-136.182
- linux-image-3.2.0-136-omap - 3.2.0-136.182
- linux-image-3.2.0-136-powerpc-smp - 3.2.0-136.182
- linux-image-3.2.0-136-powerpc64-smp - 3.2.0-136.182
- linux-image-3.2.0-136-virtual - 3.2.0-136.182
- linux-image-generic - 22.214.171.124.151
- linux-image-generic-pae - 126.96.36.199.151
- linux-image-highbank - 188.8.131.52.151
- linux-image-omap - 184.108.40.206.151
- linux-image-powerpc - 220.127.116.11.151
- linux-image-powerpc-smp - 18.104.22.168.151
- linux-image-powerpc64-smp - 22.214.171.124.151
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.