dist 3.5 allows local users to overwrite arbitrary files via a symlink attack on (a) /tmp/cil#####, (b) /tmp/pdo#####, and (c) /tmp/pdn##### temporary files, related to the (1) patcil and (2) patdiff scripts.
https://exchange.xforce.ibmcloud.com/vulnerabilities/44818
https://bugs.gentoo.org/show_bug.cgi?id=235770
http://www.securityfocus.com/bid/30908
http://www.openwall.com/lists/oss-security/2008/10/30/2