USN-1787-1: Linux kernel vulnerabilities

2 April 2013

linux vulnerabilities

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

  • Ubuntu 11.10


Several security issues were fixed in the kernel.

Software Description

  • 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)

Update instructions

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:

After a standard system update you need to reboot your computer to make all the necessary changes.