ESB-2017.2519 - [Ubuntu] git: Execute arbitrary code/commands - Existing account 2017-10-06

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2519
                             Git vulnerability
                              6 October 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           git
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-14867  

Reference:         ESB-2017.2452

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3438-1

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==========================================================================
Ubuntu Security Notice USN-3438-1
October 05, 2017

git vulnerability
==========================================================================

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

- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Git be made to run programs if it processed a specially crafted file.

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

Details:

It was discovered that Git incorrectly handled certain subcommands such as
cvsserver. A remote attacker could possibly use this issue via shell
metacharacters in modules names to execute arbitrary code.

This update also removes the cvsserver subcommand from git-shell by
default.

Update instructions:

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

Ubuntu 17.04:
  git                             1:2.11.0-2ubuntu0.3

Ubuntu 16.04 LTS:
  git                             1:2.7.4-0ubuntu1.3

Ubuntu 14.04 LTS:
  git                             1:1.9.1-1ubuntu0.7

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

References:
  https://www.ubuntu.com/usn/usn-3438-1
  CVE-2017-14867

Package Information:
  https://launchpad.net/ubuntu/+source/git/1:2.11.0-2ubuntu0.3
  https://launchpad.net/ubuntu/+source/git/1:2.7.4-0ubuntu1.3
  https://launchpad.net/ubuntu/+source/git/1:1.9.1-1ubuntu0.7

- --------------------------END INCLUDED TEXT--------------------

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