USN-1787-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1787-1

2nd 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).

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 11.10:
linux-image-3.0.0-32-powerpc64-smp 3.0.0-32.51
linux-image-3.0.0-32-omap 3.0.0-32.51
linux-image-3.0.0-32-generic 3.0.0-32.51
linux-image-3.0.0-32-server 3.0.0-32.51
linux-image-3.0.0-32-powerpc-smp 3.0.0-32.51
linux-image-3.0.0-32-virtual 3.0.0-32.51
linux-image-3.0.0-32-powerpc 3.0.0-32.51
linux-image-3.0.0-32-generic-pae 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.


CVE-2013-0914, CVE-2013-1767, CVE-2013-1792