Title

The Enterprise Voice, Video, and Messaging Endpoint must display an explicit logout message to users indicating the reliable termination of communications sessions. (Cat II impact)

Discussion

If a user cannot explicitly end a session, the session may remain open and be exploited by an attacker; this is referred to as a zombie session. Users need to be aware of whether or not the session has been terminated. Logout messages for access, for example, can be displayed after authenticated sessions have been terminated. However, for some types of interactive sessions including, for example, remote login, information systems typically send logout messages as final messages prior to terminating sessions. This applies to network elements that have the concept of a user account and have the login function residing on the network element.

Check Content

Verify the Enterprise Voice, Video, and Messaging Endpoint displays an explicit logout message to users indicating the termination of communications sessions. If the Enterprise Voice, Video, and Messaging Endpoint does not display an explicit logout message to users, this is a finding.

Fix Text

Configure the Enterprise Voice, Video, and Messaging Endpoint to display an explicit logout message to users indicating the termination of communications sessions.

Additional Identifiers

Rule ID: SV-259984r948919_rule

Vulnerability ID: V-259984

Group Title: SRG-NET-000519

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.