The token processing system (pki-tps) in Red Hat Certificate System (RHCS) before 8.1.3 does not properly handle interruptions of token format operations, which allows remote attackers to cause a denial of service (NULL pointer dereference and Apache httpd web server child process crash) via unspecified vectors.
https://bugzilla.redhat.com/show_bug.cgi?id=869570
http://www.securitytracker.com/id?1027846
http://www.securityfocus.com/bid/56843