IBM WebSphere MQ 6.0 on OpenVMS, when the default rights of the MQM group are established, does not properly verify User Authorization File (UAF) data, which allows local users to kill listener processes and the command server via a control command.
IBM WebSphere MQ 6.0 before 6.0.2.8 and 7.0 before 7.0.1.0 does not properly handle long group names, which might allow local users to gain privileges by leveraging combinations of group names with the same initial substring.