Ghostscript 8.64, 8.70, and possibly other versions allows context-dependent attackers to execute arbitrary code via a PostScript file containing unlimited recursive procedure invocations, which trigger memory corruption in the stack of the interpreter.
http://www.vupen.com/english/advisories/2010/1138
http://www.ubuntu.com/usn/USN-961-1
http://www.securityfocus.com/archive/1/511243/100/0/threaded
http://www.mandriva.com/security/advisories?name=MDVSA-2010:134
http://security.gentoo.org/glsa/glsa-201412-17.xml
http://secunia.com/advisories/40580
http://secunia.com/advisories/39753
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html