Unspecified "absolute path vulnerability" in umountall in IBM AIX 5.1 through 5.3 allows local users to cause unknown impact via unknown vectors.
http://www.vupen.com/english/advisories/2005/2784
http://www.securityfocus.com/bid/15758
http://www-1.ibm.com/support/docview.wss?uid=isg1IY79485
http://www-1.ibm.com/support/docview.wss?uid=isg1IY75294
http://www-1.ibm.com/support/docview.wss?uid=isg1IY75283