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.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18672
https://exchange.xforce.ibmcloud.com/vulnerabilities/18671
http://www.vuxml.org/freebsd/9168253c-5a6d-11d9-a9e7-0001020eed82.html
http://www.securityfocus.com/bid/12109
http://www.securityfocus.com/bid/12108