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USN-1741-1: Linux kernel vulnerability

22 February 2013

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




Suleiman Souhlal, Salman Qazi, Aaron Durbin and Michael Davidson discovered
a race condition in the Linux kernel's ptrace syscall. An unprivileged
local attacker could exploit this flaw to run programs as an administrator.

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-1739-1: linux-image-3.0.0-31-omap, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-powerpc64-smp, linux, linux-image-3.0.0-31-powerpc-smp, linux-image-3.0.0-31-server, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-powerpc
  • USN-1743-1: linux-lts-quantal, linux-image-3.5.0-25-generic
  • USN-1740-1: linux-ti-omap4, linux-image-3.0.0-1221-omap4
  • USN-1745-1: linux-ti-omap4, linux-image-3.5.0-220-omap4
  • USN-1742-1: linux-ti-omap4, linux-image-3.2.0-1426-omap4
  • USN-1738-1: linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-31-server, linux-image-3.0.0-31-generic
  • USN-1744-1: linux-image-3.5.0-25-highbank, linux-image-3.5.0-25-generic, linux, linux-image-3.5.0-25-powerpc-smp, linux-image-3.5.0-25-powerpc64-smp, linux-image-3.5.0-25-omap
  • USN-1737-1: linux-image-2.6.32-350-ec2, linux-ec2
  • USN-1736-1: linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-powerpc, linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-preempt, linux-image-2.6.32-45-server, linux-image-2.6.32-45-versatile, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-386, linux, linux-image-2.6.32-45-powerpc64-smp, linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-powerpc-smp, linux-image-2.6.32-45-ia64, linux-image-2.6.32-45-generic-pae