USN-1833-1: Linux kernel vulnerabilities

24 May 2013

Several security issues were fixed in the kernel.

Releases

Packages

Details

Andy Lutomirski discover an error in the Linux kernel's credential handling
on unix sockets. A local user could exploit this flaw to gain
administrative privileges. (CVE-2013-1979)

A buffer overflow vulnerability was discovered in the Broadcom tg3 ethernet
driver for the Linux kernel. A local user could exploit this flaw to cause
a denial of service (crash the system) or potentially escalate privileges
on the system. (CVE-2013-1929)

An information leak was discovered in the Linux kernel's tkill and tgkill
system calls when used from compat processes. A local user could exploit
this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)

A flaw was discovered in the Linux kernel's ftrace subsystem interface. A
local user could exploit this flaw to cause a denial of service (system
crash). (CVE-2013-3301)

Update instructions

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

Ubuntu 12.04

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.

Related notices

  • USN-1882-1: linux-image-3.5.0-226-omap4, linux-ti-omap4
  • USN-1834-1: linux-lts-quantal, linux-image-3.5.0-31-generic
  • USN-1900-1: linux-ec2, linux-image-2.6.32-354-ec2
  • USN-1838-1: linux-ti-omap4, linux-image-3.5.0-225-omap4
  • USN-1835-1: linux-image-3.5.0-31-powerpc64-smp, linux-image-3.5.0-31-omap, linux, linux-image-3.5.0-31-generic, linux-image-3.5.0-31-powerpc-smp, linux-image-3.5.0-31-highbank
  • USN-1881-1: linux-image-3.5.0-34-powerpc-smp, linux-image-3.5.0-34-highbank, linux, linux-image-3.5.0-34-powerpc64-smp, linux-image-3.5.0-34-generic, linux-image-3.5.0-34-omap
  • USN-1883-1: linux-image-3.5.0-226-omap4, linux-ti-omap4
  • USN-1899-1: linux-image-2.6.32-49-generic-pae, linux-image-2.6.32-49-preempt, linux-image-2.6.32-49-sparc64-smp, linux-image-2.6.32-49-sparc64, linux-image-2.6.32-49-ia64, linux-image-2.6.32-49-generic, linux, linux-image-2.6.32-49-386, linux-image-2.6.32-49-lpia, linux-image-2.6.32-49-powerpc, linux-image-2.6.32-49-powerpc64-smp, linux-image-2.6.32-49-server, linux-image-2.6.32-49-powerpc-smp, linux-image-2.6.32-49-virtual, linux-image-2.6.32-49-versatile
  • USN-1837-1: linux, linux-image-3.8.0-22-generic
  • USN-1836-1: linux-ti-omap4, linux-image-3.5.0-225-omap4
  • USN-1815-1: linux, linux-image-3.8.0-19-generic
  • USN-1849-1: linux-lts-raring, linux-image-3.8.0-23-generic
  • USN-1880-1: linux-lts-quantal, linux-image-3.5.0-34-generic
  • USN-1839-1: linux-image-3.2.0-1432-omap4, linux-ti-omap4