Directory traversal vulnerability in GNU Mailman before 2.1.20, when not using a static alias, allows remote attackers to execute arbitrary files via a .. (dot dot) in a list name.
https://mail.python.org/pipermail/mailman-developers/2015-March/024871.html
https://mail.python.org/pipermail/mailman-announce/2015-March/000209.html
https://bugs.launchpad.net/mailman/+bug/1437145
http://www.ubuntu.com/usn/USN-2558-1
http://www.securitytracker.com/id/1032033
http://www.securityfocus.com/bid/73922
http://www.debian.org/security/2015/dsa-3214
http://rhn.redhat.com/errata/RHSA-2015-1417.html
http://rhn.redhat.com/errata/RHSA-2015-1153.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156742.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154911.html