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Gentoo Linux Security Advisory                           GLSA 200903-15
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  Severity: High
     Title: git: Multiple vulnerabilties
      Date: March 09, 2009
      Bugs: #251343
        ID: 200903-15

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Synopsis
========

Multiple vulnerabilities in gitweb allow for remote execution of
arbitrary commands.

Background
==========

GIT - the stupid content tracker, the revision control system used by
the Linux kernel team.

Affected packages
=================

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  dev-util/git      < 1.6.0.6                            >= 1.6.0.6

Description
===========

Multiple vulnerabilities have been reported in gitweb that is part of
the git package:

* Shell metacharacters related to git_search are not properly
  sanitized (CVE-2008-5516).

* Shell metacharacters related to git_snapshot and git_object are not
  properly sanitized (CVE-2008-5517).

* The diff.external configuration variable as set in a repository can
  be executed by gitweb (CVE-2008-5916).

Impact
======

A remote unauthenticated attacker can execute arbitrary commands via
shell metacharacters in a query, remote attackers with write access to
a git repository configuration can execute arbitrary commands with the
privileges of the user running gitweb by modifying the diff.external
configuration variable in the repository and sending a crafted query to
gitweb.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All git users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-util/git-1.6.0.6"

References
==========

  [ 1 ] CVE-2008-5516
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5516
  [ 2 ] CVE-2008-5517
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5517
  [ 3 ] CVE-2008-5916
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5916

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200903-15.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2009 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

--

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