The ALG providing network user authentication proxy services must display an explicit logout message to users indicating the reliable termination of authenticated communications sessions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000308-ALG-000008	SRG-NET-000308-ALG-000008	SRG-NET-000308-ALG-000008_rule		Medium

Description
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 policy only applies to ALGs (e.g., identity management or authentication gateways) that provide user account services as part of the intermediary services.

Description

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 policy only applies to ALGs (e.g., identity management or authentication gateways) that provide user account services as part of the intermediary services.

STIG	Date
Application Layer Gateway Security Requirements Guide	2014-06-27

Details

Check Text ( C-SRG-NET-000308-ALG-000008_chk )
If the ALG does not provide user authentication proxy services, this is not a finding. Verify the ALG displays an explicit logout message to users indicating the reliable termination of authenticated communications sessions. If the ALG does not display an explicit logout message to users indicating the reliable termination of authenticated communications sessions, this is a finding.

Fix Text (F-SRG-NET-000308-ALG-000008_fix)
Configure the ALG to display an explicit logout message to users indicating the reliable termination of authenticated communications sessions.