Format string vulnerability in enq command in AIX 4.3, 5.1, and 5.2 allows local users with rintq group privileges to gain privileges via unknown attack vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/14037
http://www.securityfocus.com/bid/9254
http://www-1.ibm.com/services/continuity/recover1.nsf/mss/MSS-OAR-E01-20