8.3 - USN-3779-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in the Linux kernel.

Software Description: - linux: Linux kernel

Details:

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)

Update instructions:

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 3.2.0.136.151
linux-image-generic-pae 3.2.0.136.151
linux-image-highbank 3.2.0.136.151
linux-image-omap 3.2.0.136.151
linux-image-powerpc 3.2.0.136.151
linux-image-powerpc-smp 3.2.0.136.151
linux-image-powerpc64-smp 3.2.0.136.151

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:
https://usn.ubuntu.com/usn/usn-3779-1
CVE-2018-14633, CVE-2018-14634