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USN-2852-1: Linux kernel (Raspberry Pi 2) vulnerability

19 December 2015

The system could be made to provide access outside of namespace sandbox.

Releases

Packages

Details

Jann Horn discovered a ptrace issue with user namespaces in the Linux
kernel. The namespace owner could potentially exploit this flaw by ptracing
a root owned process entering the user namespace to elevate its privileges
and potentially gain access outside of the namespace.
(http://bugs.launchpad.net/bugs/1527374, CVE-2015-8709)

Update instructions

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

Ubuntu 15.10

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

Related notices

  • USN-2853-1: linux-image-4.2.0-22-powerpc-smp, linux-image-4.2.0-22-powerpc64-emb, linux-image-4.2.0-22-lowlatency, linux-image-4.2.0-22-powerpc-e500mc, linux-lts-wily, linux-image-extra-4.2.0-22-generic, linux-image-4.2.0-22-powerpc64-smp, linux-image-4.2.0-22-generic-lpae, linux-image-4.2.0-22-generic
  • USN-2851-1: linux-image-4.2.0-22-powerpc-smp, linux-image-4.2.0-22-powerpc64-emb, linux-image-4.2.0-22-lowlatency, linux-image-4.2.0-22-powerpc-e500mc, linux-image-4.2.0-22-powerpc64-smp, linux-image-4.2.0-22-generic-lpae, linux, linux-image-4.2.0-22-generic
  • USN-2848-1: linux-image-3.13.0-74-powerpc64-emb, linux-image-3.13.0-74-lowlatency, linux-image-3.13.0-74-generic, linux-image-3.13.0-74-generic-lpae, linux-image-3.13.0-74-powerpc-e500, linux-image-3.13.0-74-powerpc-smp, linux-image-extra-3.13.0-74-generic, linux-image-3.13.0-74-powerpc-e500mc, linux, linux-image-3.13.0-74-powerpc64-smp
  • USN-2849-1: linux-lts-utopic, linux-image-3.16.0-57-powerpc-e500mc, linux-image-3.16.0-57-generic-lpae, linux-image-3.16.0-57-powerpc64-smp, linux-image-3.16.0-57-lowlatency, linux-image-3.16.0-57-powerpc-smp, linux-image-extra-3.16.0-57-generic, linux-image-3.16.0-57-powerpc64-emb, linux-image-3.16.0-57-generic
  • USN-2854-1: linux-image-3.19.0-42-powerpc-smp, linux-image-3.19.0-42-powerpc-e500mc, linux-image-3.19.0-42-powerpc64-emb, linux-lts-vivid, linux-image-3.19.0-42-generic-lpae, linux-image-3.19.0-42-generic, linux-image-extra-3.19.0-42-generic, linux-image-3.19.0-42-lowlatency, linux-image-3.19.0-42-powerpc64-smp
  • USN-2850-1: linux-image-3.19.0-42-powerpc-e500mc, linux-image-3.19.0-42-powerpc-smp, linux-image-3.19.0-42-powerpc64-emb, linux-image-3.19.0-42-generic-lpae, linux-image-3.19.0-42-generic, linux-image-3.19.0-42-lowlatency, linux, linux-image-3.19.0-42-powerpc64-smp
  • USN-2847-1: linux-image-3.13.0-74-generic-lpae, linux-lts-trusty, linux-image-3.13.0-74-generic