CRLF injection vulnerability in Jenkins before 1.491, Jenkins LTS before 1.480.1, and Jenkins Enterprise 1.424.x before 1.424.6.13, 1.447.x before 1.447.4.1, and 1.466.x before 1.466.10.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.
https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2012-11-20
https://bugzilla.redhat.com/show_bug.cgi?id=890607
http://www.cloudbees.com/jenkins-advisory/jenkins-security-advisory-2012-11-20.cb