Ubuntu Security Notice USN-1787-1
2nd 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).
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: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.