The malloc subsystem in libc in IBM AIX 5.3 and 6.1 allows local users to create or overwrite arbitrary files via a symlink attack on the log file associated with the MALLOCDEBUG environment variable.
aix.software.ibm.com/aix/efixes/security/libc_advisory.asc
labs.idefense.com/intelligence/vulnerabilities/display.php?id=802
secunia.com/advisories/35146
securitytracker.com/id?1022261
www.ibm.com/support/docview.wss?uid=isg1IZ50121
www.ibm.com/support/docview.wss?uid=isg1IZ50129
www.ibm.com/support/docview.wss?uid=isg1IZ50139
www.ibm.com/support/docview.wss?uid=isg1IZ50445
www.ibm.com/support/docview.wss?uid=isg1IZ50447
www.ibm.com/support/docview.wss?uid=isg1IZ50500
www.ibm.com/support/docview.wss?uid=isg1IZ50517
www.osvdb.org/54617
www.securityfocus.com/bid/35034
www.vupen.com/english/advisories/2009/1380
exchange.xforce.ibmcloud.com/vulnerabilities/50636
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6276
www.exploit-db.com/exploits/9306