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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.

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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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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