fuser in IBM AIX 6.1 and 7.1, and VIOS 2.2.1.4-FP-25 SP-02, does not properly restrict the -k option, which allows local users to kill arbitrary processes via a crafted command line.
aix.software.ibm.com/aix/efixes/security/fuser_advisory.asc
secunia.com/advisories/50708
www.ibm.com/support/docview.wss?uid=isg1IV28151
www.ibm.com/support/docview.wss?uid=isg1IV28749
www.ibm.com/support/docview.wss?uid=isg1IV28754
www.ibm.com/support/docview.wss?uid=isg1IV28756
www.securityfocus.com/bid/55726
www.securitytracker.com/id?1027586
exchange.xforce.ibmcloud.com/vulnerabilities/78907