USN-2585-1: Linux kernel vulnerability

30 April 2015

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

Releases

Packages

Details

It was discovered that the Linux kernel's IPv6 networking stack has a flaw
that allows using route advertisement (RA) messages to set the 'hop_limit'
to values that are too low. An unprivileged attacker on a local network
could exploit this flaw to cause a denial of service (IPv6 messages
dropped).

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.

References

Related notices

  • USN-2586-1: linux-ti-omap4, linux-image-3.2.0-1463-omap4
  • USN-2587-1: linux-image-3.13.0-51-generic-lpae, linux-lts-trusty, linux-image-3.13.0-51-generic
  • USN-2588-1: linux-image-3.13.0-51-lowlatency, linux-image-3.13.0-51-powerpc64-emb, linux-image-3.13.0-51-generic, linux-image-3.13.0-51-powerpc-e500, linux-image-3.13.0-51-powerpc-smp, linux-image-3.13.0-51-generic-lpae, linux, linux-image-3.13.0-51-powerpc64-smp, linux-image-3.13.0-51-powerpc-e500mc
  • USN-2589-1: linux-image-3.16.0-36-powerpc-smp, linux-image-3.16.0-36-lowlatency, linux-image-3.16.0-36-generic, linux-image-3.16.0-36-powerpc-e500mc, linux-image-3.16.0-36-powerpc64-emb, linux-image-3.16.0-36-generic-lpae, linux-lts-utopic, linux-image-3.16.0-36-powerpc64-smp
  • USN-2590-1: linux-image-3.16.0-36-powerpc-smp, linux-image-3.16.0-36-lowlatency, linux-image-3.16.0-36-generic, linux-image-3.16.0-36-powerpc-e500mc, linux-image-3.16.0-36-powerpc64-emb, linux-image-3.16.0-36-generic-lpae, linux, linux-image-3.16.0-36-powerpc64-smp