libgit2: Multiple vulnerabilities

Background

libgit2 is a portable, pure C implementation of the Git core methods provided as a re-entrant linkable library with a solid API.

Description

Multiple vulnerabilities have been discovered in libgit2. Please review the CVE identifiers referenced below for details.

Impact

An attacker could possibly overwrite arbitrary paths, execute arbitrary code, and overwrite files in the .git directory.

Workaround

There is no known workaround at this time.

Resolution

All libgit2 users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-libs/libgit2-0.28.4"