USN-2043-1: Linux kernel vulnerabilities

3 December 2013

linux vulnerabilities

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

  • Ubuntu 12.10

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel

Details

A flaw was discovered in the Linux kernel’s dm snapshot facility. A remote authenticated user could exploit this flaw to obtain sensitive information or modify/corrupt data. (CVE-2013-4299)

Hannes Frederic Sowa discovered a flaw in the Linux kernel’s UDP Fragmentation Offload (UFO). An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or possibly gain administrative privileges. (CVE-2013-4470)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.10
linux-image-3.5.0-44-generic - 3.5.0-44.67
linux-image-3.5.0-44-highbank - 3.5.0-44.67
linux-image-3.5.0-44-omap - 3.5.0-44.67
linux-image-3.5.0-44-powerpc-smp - 3.5.0-44.67
linux-image-3.5.0-44-powerpc64-smp - 3.5.0-44.67

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. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References