lscfg in IBM AIX 5.2 and 5.3 allows local users to modify arbitrary files via a symlink attack.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2006-0674
http://www.vupen.com/english/advisories/2005/2096
http://www-1.ibm.com/support/docview.wss?uid=isg1IY77638