ESB-2018.3108 - [Ubuntu] git: Execute arbitrary code/commands - Remote with user interaction 2018-10-12

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

                               ESB-2018.3108
                             Git vulnerability
                              12 October 2018

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

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

Product:           git
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-17456  

Reference:         ESB-2018.3024
                   ESB-2018.3022

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3791-1

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Ubuntu Security Notice USN-3791-1
October 12, 2018

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

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

- - Ubuntu 18.04 LTS
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Git could be made to run programs as your login if it recursively
opened a malicious git repository.

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

Details:

It was discovered that git did not properly validate git submodule
urls or paths. A remote attacker could possibly use this to craft a
git repository that causes arbitrary code execution when recursive
operations are used.

Update instructions:

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

Ubuntu 18.04 LTS:
  git                             1:2.17.1-1ubuntu0.3

Ubuntu 16.04 LTS:
  git                             1:2.7.4-0ubuntu1.5

Ubuntu 14.04 LTS:
  git                             1:1.9.1-1ubuntu0.9

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

References:
  https://usn.ubuntu.com/usn/usn-3791-1
  CVE-2018-17456

Package Information:
  https://launchpad.net/ubuntu/+source/git/1:2.17.1-1ubuntu0.3
  https://launchpad.net/ubuntu/+source/git/1:2.7.4-0ubuntu1.5
  https://launchpad.net/ubuntu/+source/git/1:1.9.1-1ubuntu0.9

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