git: Multiple vulnerabilties

Background

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

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"