Title

The operating system must verify remote disconnection at the termination of nonlocal maintenance and diagnostic sessions, when used for nonlocal maintenance sessions. (Cat II impact)

Discussion

If the remote connection is not closed and verified as closed, the session may remain open and be exploited by an attacker; this is referred to as a zombie session. Remote connections must be disconnected and verified as disconnected when nonlocal maintenance sessions have been terminated and are no longer available for use.

Check Content

Verify the operating system verifies remote disconnection at the termination of nonlocal maintenance and diagnostic sessions, when used for nonlocal maintenance sessions. If it does not, this is a finding.

Fix Text

Configure the operating system to verify remote disconnection at the termination of nonlocal maintenance and diagnostic sessions, when used for nonlocal maintenance sessions.

Additional Identifiers

Rule ID: SV-203738r851809_rule

Vulnerability ID: V-203738

Group Title: SRG-OS-000395

Expert Comments

CCIs tied to check.

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