USN-1380-1: Linux kernel vulnerabilities
29 February 2012
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 flaw was discovered in the TOMOYO LSM’s handling of mount system calls. An unprivileged user could oops the system causing a denial of service. (CVE-2011-2518)
A bug was discovered in the Linux kernel’s calculation of OOM (Out of memory) scores, that would result in the wrong process being killed. A user could use this to kill the process with the highest OOM score, even if that process belongs to another user or the system. (CVE-2011-4097)
A flaw was found in the linux kernels IPv4 IGMP query processing. A remote attacker could exploit this to cause a denial of service. (CVE-2012-0207)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 11.04
- linux-image-2.6.38-13-generic - 2.6.38-13.56
- linux-image-2.6.38-13-generic-pae - 2.6.38-13.56
- linux-image-2.6.38-13-omap - 2.6.38-13.56
- linux-image-2.6.38-13-powerpc - 2.6.38-13.56
- linux-image-2.6.38-13-powerpc-smp - 2.6.38-13.56
- linux-image-2.6.38-13-powerpc64-smp - 2.6.38-13.56
- linux-image-2.6.38-13-server - 2.6.38-13.56
- linux-image-2.6.38-13-versatile - 2.6.38-13.56
- linux-image-2.6.38-13-virtual - 2.6.38-13.56
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.