pdfjam creates the (1) pdf90, (2) pdfjoin, and (3) pdfnup files with a predictable name, which allows local users to overwrite arbitrary files via a symlink attack.
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00488.html
https://www.redhat.com/archives/fedora-package-announce/2009-March/msg00484.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/47519
http://www.securityfocus.com/bid/32931