=========================================================================Ubuntu Security Notice USN-2835-1
December 15, 2015

git vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 15.10
- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Git could be made to run programs as your login if it processed an
untrusted repository.

Software Description:
- git: fast, scalable, distributed revision control system

Details:

Blake Burkhart discovered that the Git git-remote-ext helper incorrectly
handled recursive clones of git repositories. A remote attacker could
possibly use this issue to execute arbitrary code by injecting commands
via crafted URLs.

Update instructions:

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

Ubuntu 15.10:
  git                             1:2.5.0-1ubuntu0.1

Ubuntu 15.04:
  git                             1:2.1.4-2.1ubuntu0.1

Ubuntu 14.04 LTS:
  git                             1:1.9.1-1ubuntu0.2

Ubuntu 12.04 LTS:
  git                             1:1.7.9.5-1ubuntu0.2

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-2835-1
  CVE-2015-7545

Package Information:
  https://launchpad.net/ubuntu/+source/git/1:2.5.0-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/git/1:2.1.4-2.1ubuntu0.1
  https://launchpad.net/ubuntu/+source/git/1:1.9.1-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/git/1:1.7.9.5-1ubuntu0.2