The wato component in Check_MK before 1.2.4p4 and 1.2.5 before 1.2.5i4 uses the pickle Python module unsafely, which allows remote attackers to execute arbitrary code via a crafted serialized object, related to an automation URL.
http://www.securityfocus.com/archive/1/533180/100/0/threaded
http://rhn.redhat.com/errata/RHSA-2015-1495.html
http://packetstormsecurity.com/files/127941/Deutsche-Telekom-CERT-Advisory-DTC-A-20140820-001.html