USN-1833-1: Linux kernel vulnerabilities

24 May 2013

Several security issues were fixed in the kernel.




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