+AC-12 Session Termination
---+AC-12(01) User-initiated Logouts
---+AC-12(02) Termination Message
---+AC-12(03) Timeout Warning Message

AC-12 Session Termination

Control

Automatically terminate a user session after [Assignement: conditions or trigger events].

Discussion

Session termination addresses the termination of user-initiated logical sessions (in contrast to [SC-10](#sc-10) , which addresses the termination of network connections associated with communications sessions (i.e., network disconnect)). A logical session (for local, network, and remote access) is initiated whenever a user (or process acting on behalf of a user) accesses an organizational system. Such user sessions can be terminated without terminating network sessions. Session termination ends all processes associated with a user’s logical session except for those processes that are specifically created by the user (i.e., session owner) to continue after the session is terminated. Conditions or trigger events that require automatic termination of the session include organization-defined periods of user inactivity, targeted responses to certain types of incidents, or time-of-day restrictions on system use.

Assessment Objective

a user session is automatically terminated after [Assignement: conditions or trigger events].

Assessment Method

Examine

Access control policy procedures addressing session termination system design documentation system configuration settings and associated documentation list of conditions or trigger events requiring session disconnect system audit records system security plan other relevant documents or records

Interview

System/network administrators organizational personnel with information security responsibilities system developers

1. Visão geral

Título Norma
AC-12(01) User-initiated Logouts

Control

Provide a logout capability for user-initiated communications sessions whenever authentication is used to gain access to [Assignement: information resources].

Discussion

Information resources to which users gain access via authentication include local workstations, databases, and password-protected websites or web-based services.

Assessment Objective

a logout capability is provided for user-initiated communications sessions whenever authentication is used to gain access to [Assignement: information resources].

Assessment Method

Examine

Access control policy procedures addressing session termination user logout messages system design documentation system configuration settings and associated documentation system audit records system security plan other relevant documents or records

Interview

System/network administrators organizational personnel with information security responsibilities system developers
AC-12(02) Termination Message

Control

Display an explicit logout message to users indicating the termination of authenticated communications sessions.

Discussion

Logout messages for web access can be displayed after authenticated sessions have been terminated. However, for certain types of sessions, including file transfer protocol (FTP) sessions, systems typically send logout messages as final messages prior to terminating sessions.

Assessment Objective

an explicit logout message is displayed to users indicating the termination of authenticated communication sessions.

Assessment Method

Examine

Access control policy procedures addressing session termination user logout messages system design documentation system configuration settings and associated documentation system audit records system security plan other relevant documents or records

Interview

System/network administrators organizational personnel with information security responsibilities system developers
AC-12(03) Timeout Warning Message

Control

Display an explicit message to users indicating that the session will end in [Assignement: time].

Discussion

To increase usability, notify users of pending session termination and prompt users to continue the session. The pending session termination time period is based on the parameters defined in the [AC-12](#ac-12) base control.

Assessment Objective

an explicit message to users is displayed indicating that the session will end in [Assignement: time].

Assessment Method

Examine

Access control policy procedures addressing session termination time until end of session messages system design documentation system configuration settings and associated documentation system audit records system security plan other relevant documents or records

Interview

System/network administrators organizational personnel with information security responsibilities system developers

1.1 Referências

1.2 Requisitos identificados

1.3 Regulamentos relacionados

2. Requisitos identificados

Requisitos
Fonte Requisito

3. Regulamentos relacionados

Regulamentos
Fonte Regulamentação

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