The (1) fixps (aka fixps.in) and (2) psmandup (aka psmandup.in) scripts in a2ps before 4.13 allow local users to overwrite arbitrary files via a symlink attack on temporary files.
secunia.com/advisories/13641
www.gentoo.org/security/en/glsa/glsa-200501-02.xml
www.securityfocus.com/bid/12108
www.securityfocus.com/bid/12109
www.vuxml.org/freebsd/9168253c-5a6d-11d9-a9e7-0001020eed82.html
exchange.xforce.ibmcloud.com/vulnerabilities/18671
exchange.xforce.ibmcloud.com/vulnerabilities/18672