The runtime linker in IBM AIX 6.1 and 7.1 and VIOS 2.2.x allows local users to create a mode-666 root-owned file, and consequently gain privileges, by setting crafted MALLOCOPTIONS and MALLOCBUCKETS environment-variable values and then executing a setuid program.
https://exchange.xforce.ibmcloud.com/vulnerabilities/93816
http://www.securitytracker.com/id/1030504
http://www.securityfocus.com/bid/68296
http://www.securityfocus.com/archive/1/532689/100/0/threaded
http://www.ibm.com/support/docview.wss?uid=isg1IV61315
http://www.ibm.com/support/docview.wss?uid=isg1IV61314
http://www.ibm.com/support/docview.wss?uid=isg1IV61313
http://www.ibm.com/support/docview.wss?uid=isg1IV61311
http://www.ibm.com/support/docview.wss?uid=isg1IV60940
http://www.ibm.com/support/docview.wss?uid=isg1IV60935
http://secunia.com/advisories/59344
http://seclists.org/fulldisclosure/2014/Jul/31
http://packetstormsecurity.com/files/127390/IBM-AIX-Runtime-Linker-Privilege-Escalation.html
http://aix.software.ibm.com/aix/efixes/security/malloc_advisory.asc