NIST Special Publication 800-171 Revision 2
Date Published: January 28th, 2021
Withdrawn on May 14, 2024. Superseded by SP 800-171 Rev. 3
Author(s): Ron Ross (NIST), Victoria Pillitteri (NIST), Kelley Dempsey (NIST), Mark Riddle (NARA), Gary Guissanie (IDA)
Note: A Class Deviation is in effect as of May 2, 2024 (DEVIATION 2024O0013). The deviation clause requires contractors, who are subject to 252.204-7012, to comply with National Institute of Standards and Technology (NIST) Special Publication (SP) 800-171 Revision 2, instead of the version of NIST SP 800-171 in effect at the time the solicitation is issued or as authorized by the contracting officer. Click Here
AC-3.1.10 Use session lock with pattern-hiding displays to prevent access and viewing of data
after a period of inactivity.
Control Family: Access Control
Control Type: Derived
SPRS Value: 1
CMMC Level(s):
AC.L2-3.1.10
Top Ten Failed Requirement:
No
Referenced in:
DFARS 252.204-7012
Derived From: NIST SP 800-53r4
AC-11
AC-11(1)
Discussion:
Session locks are temporary actions taken when users stop work and move away from the immediate vicinity of the system but do not want to log out because of the temporary nature of their absences. Session locks are implemented where session activities can be determined, typically at the operating system level (but can also be at the application level). Session locks are not an acceptable substitute for logging out of the system, for example, if organizations require users to log out at the end of the workday. Pattern-hiding displays can include static or dynamic images, for example, patterns used with screen savers, photographic images, solid colors, clock, battery life indicator, or a blank screen, with the additional caveat that none of the images convey controlled unclassified information.
Determining Statements (NIST SP 800-171Ar2)
Upon assessment, assessors must determine if-
3.1.10[a] the period of inactivity after which the system initiates a session lock is
defined.
3.1.10[b] access to the system and viewing of data is prevented by initiating a session
lock after the defined period of inactivity.
3.1.10[c] previously visible information is concealed via a pattern-hiding display after
the defined period of inactivity.
Assessors are instructed to-
Examine: [SELECT FROM: Access control policy; procedures addressing session lock; procedures addressing identification and authentication; system design documentation; system configuration settings and associated documentation; system security plan; other relevant documents or records].
Interview: [SELECT FROM: System or network administrators; personnel with information security responsibilities; system developers].
Test: [SELECT FROM: Mechanisms implementing access control policy for session lock].
Potential Solutions Based on Staffing
1-10 FTE |
10-49 FTE |
50-249 FTE |
250-999 FTE |
1000+ FTE |
|---|---|---|---|---|
| Cimcor CimTrak | Cimcor CimTrak | Cimcor CimTrak | Cimcor CimTrak | Cimcor CimTrak |
| Netwrix Auditor | Netwrix Auditor | Netwrix Auditor | Netwrix Auditor | Netwrix Auditor |
| Microsoft Intune | Microsoft Intune | Microsoft Intune | Microsoft Intune | Microsoft Intune |
| DISA STIGs | DISA STIGs | Tripwire Enterprise | Tripwire Enterprise | Tripwire Enterprise |
| CIS Benchmarks | CIS Benchmarks | DISA STIGs | DISA STIGs | DISA STIGs |
| CIS SecureSuite | CIS SecureSuite | CIS Benchmarks | CIS Benchmarks | CIS Benchmarks |
| CIS SecureSuite | CIS SecureSuite | CIS SecureSuite |