USN-1919-1: Linux kernel vulnerability

Ubuntu Security Notice USN-1919-1

29th July, 2013

linux vulnerability

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

  • Ubuntu 13.04

Summary

The system could be made to crash or run programs as an administrator.

Software description

  • linux - Linux kernel

Details


Kees Cook discovered a format string vulnerability in the Broadcom B43
wireless driver for the Linux kernel. A local user could exploit this flaw
to gain administrative privileges. (CVE-2013-2852)

Marcus Moeller and Ken Fallon discovered that the CIFS incorrectly built
certain paths. A local attacker with access to a CIFS partition could
exploit this to crash the system, leading to a denial of service.
(CVE-2013-4247)

Update instructions

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

Ubuntu 13.04:
linux-image-3.8.0-27-generic 3.8.0-27.40

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.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

CVE-2013-2852, CVE-2013-4247