USN-1312-1: Linux kernel vulnerabilities
19 December 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Several security issues were fixed in the kernel.
- linux - Linux kernel
A bug was discovered in the XFS filesystem’s handling of pathnames. A local attacker could exploit this to crash the system, leading to a denial of service, or gain root privileges. (CVE-2011-4077)
Nick Bowler discovered the kernel GHASH message digest algorithm incorrectly handled error conditions. A local attacker could exploit this to cause a kernel oops. (CVE-2011-4081)
A flaw was found in the Journaling Block Device (JBD). A local attacker able to mount ext3 or ext4 file systems could exploit this to crash the system, leading to a denial of service. (CVE-2011-4132)
Clement Lecigne discovered a bug in the HFS file system bounds checking. When a malformed HFS file system is mounted a local user could crash the system or gain root privileges. (CVE-2011-4330)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 11.04
- linux-image-2.6.38-13-generic - 2.6.38-13.53
- linux-image-2.6.38-13-generic-pae - 2.6.38-13.53
- linux-image-2.6.38-13-omap - 2.6.38-13.53
- linux-image-2.6.38-13-powerpc - 2.6.38-13.53
- linux-image-2.6.38-13-powerpc-smp - 2.6.38-13.53
- linux-image-2.6.38-13-powerpc64-smp - 2.6.38-13.53
- linux-image-2.6.38-13-server - 2.6.38-13.53
- linux-image-2.6.38-13-versatile - 2.6.38-13.53
- linux-image-2.6.38-13-virtual - 2.6.38-13.53
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.