Title

The operating system must provide a logoff capability for user-initiated communications sessions when requiring user access authentication. (Cat II impact)

Discussion

If a user cannot explicitly end an operating system session, the session may remain open and be exploited by an attacker; this is referred to as a zombie session. Information resources to which users gain access via authentication include, for example, local workstations and remote services. For some types of interactive sessions, including, for example, remote logon, information systems typically send logoff messages as final messages prior to terminating sessions.

Check Content

Verify the operating system provides a logoff capability for user-initiated communications sessions when requiring user access authentication. If it does not, this is a finding.

Fix Text

Configure the operating system to provide a logoff capability for user-initiated communications sessions when requiring user access authentication.

Additional Identifiers

Rule ID: SV-203684r958638_rule

Vulnerability ID: V-203684

Group Title: SRG-OS-000280

Expert Comments

CCIs tied to check.

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