USN-1787-1: Linux kernel vulnerabilities
2 April 2013
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
Several security issues were fixed in the kernel.
- linux - Linux kernel
Emese Revfy discovered that in the Linux kernel signal handlers could leak address information across an exec, making it possible to by pass ASLR (Address Space Layout Randomization). A local user could use this flaw to by pass ASLR to reliably deliver an exploit payload that would otherwise be stopped (by ASLR). (CVE-2013-0914)
A memory use after free error was discover in the Linux kernel’s tmpfs filesystem. A local user could exploit this flaw to gain privileges or cause a denial of service (system crash). (CVE-2013-1767)
Mateusz Guzik discovered a race in the Linux kernel’s keyring. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-1792)
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 11.10
- linux-image-3.0.0-32-generic - 3.0.0-32.51
- linux-image-3.0.0-32-generic-pae - 3.0.0-32.51
- linux-image-3.0.0-32-omap - 3.0.0-32.51
- linux-image-3.0.0-32-powerpc - 3.0.0-32.51
- linux-image-3.0.0-32-powerpc-smp - 3.0.0-32.51
- linux-image-3.0.0-32-powerpc64-smp - 3.0.0-32.51
- linux-image-3.0.0-32-server - 3.0.0-32.51
- linux-image-3.0.0-32-virtual - 3.0.0-32.51
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.