pdftops.pl before 1.20 in alternate pdftops filter allows local users to overwrite arbitrary files via a symlink attack on the pdfin.[PID].tmp temporary file, which is created when pdftops reads a PDF file from stdin, such as when pdftops is invoked by CUPS.
osvdb.org/42029
secunia.com/advisories/28113
secunia.com/advisories/28139
secunia.com/advisories/28200
secunia.com/advisories/28386
www.cups.org/articles.php?L515
www.debian.org/security/2007/dsa-1437
www.gentoo.org/security/en/glsa/glsa-200712-14.xml
www.securityfocus.com/bid/26919
www.ubuntu.com/usn/usn-563-1
bugs.gentoo.org/show_bug.cgi?id=201042