The cupsFileOpen function in CUPS before 1.4.4 allows local users, with lp group membership, to overwrite arbitrary files via a symlink attack on the (1) /var/cache/cups/remote.cache or (2) /var/cache/cups/job.cache file.
cups.org/articles.php?L596
cups.org/str.php?L3510
rhn.redhat.com/errata/RHSA-2010-0811.html
secunia.com/advisories/43521
security.gentoo.org/glsa/glsa-201207-10.xml
www.debian.org/security/2011/dsa-2176
www.mandriva.com/security/advisories?name=MDVSA-2010:232
www.mandriva.com/security/advisories?name=MDVSA-2010:234
www.vupen.com/english/advisories/2010/2856
www.vupen.com/english/advisories/2011/0535
bugzilla.redhat.com/show_bug.cgi?id=605397