The Access Control functionality (JMXOpsAccessControlFilter) in JMX Console in JBoss Application Server 4.0.2 and 4.0.5 before 20070416 uses a member variable to store the roles of the current user, which allows remote authenticated administrators to trigger a race condition and gain privileges by logging in during a session by a more privileged administrator, as demonstrated by privilege escalation from Read Mode to Write Mode.
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