Incomplete blacklist vulnerability in action_power.py in Cobbler 2.2.0 allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) username or (2) password fields to the power_system method in the xmlrpc API.
https://github.com/cobbler/cobbler/issues/141
https://bugs.launchpad.net/ubuntu/+source/cobbler/+bug/978999
http://www.securityfocus.com/bid/53666
http://www.openwall.com/lists/oss-security/2012/05/23/4
http://www.openwall.com/lists/oss-security/2012/05/23/18
http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00016.html