virtualenv.py in virtualenv before 1.5 allows local users to overwrite arbitrary files via a symlink attack on a certain file in /tmp/.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-4617
• http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071638.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071643.html
• http://openwall.com/lists/oss-security/2011/12/19/2
• http://openwall.com/lists/oss-security/2011/12/19/4
• http://openwall.com/lists/oss-security/2011/12/19/5
• pypa/virtualenv@68075ad
• https://web.archive.org/web/20200228151935/https://bitbucket.org/ianb/virtualenv/commits/8be37c509fe5