USN-1293-1: Linux kernel vulnerabilities
8 December 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
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)
A bug was found in the way headroom check was performed in udp6_ufo_fragment() function. A remote attacker could use this flaw to crash the system. (CVE-2011-4326)
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 10.10
- linux-image-2.6.35-31-generic - 2.6.35-31.63
- linux-image-2.6.35-31-generic-pae - 2.6.35-31.63
- linux-image-2.6.35-31-omap - 2.6.35-31.63
- linux-image-2.6.35-31-powerpc - 2.6.35-31.63
- linux-image-2.6.35-31-powerpc-smp - 2.6.35-31.63
- linux-image-2.6.35-31-powerpc64-smp - 2.6.35-31.63
- linux-image-2.6.35-31-server - 2.6.35-31.63
- linux-image-2.6.35-31-versatile - 2.6.35-31.63
- linux-image-2.6.35-31-virtual - 2.6.35-31.63
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.