virtualenv.py in virtualenv before 1.5 allows local users to overwrite arbitrary files via a symlink attack on a certain file in /tmp/.
lists.fedoraproject.org/pipermail/package-announce/2012-January/071638.html
lists.fedoraproject.org/pipermail/package-announce/2012-January/071643.html
openwall.com/lists/oss-security/2011/12/19/2
openwall.com/lists/oss-security/2011/12/19/4
openwall.com/lists/oss-security/2011/12/19/5
secunia.com/advisories/47240
bitbucket.org/ianb/virtualenv/changeset/8be37c509fe5