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Withdrawn on May 14, 2024. Superseded by SP 800-171 Rev. 3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-3.4.5 Define, document, approve, and enforce physical and logical access restrictions associated with changes to organizational systems.
Control Family: Configuration Management
Control Type: Derived
SPRS Value: 5
SPRS Supplemental Guidance:
N/A
CMMC Level(s):
CM.L2-3.4.5
Top Ten Failed Requirement:
No
Referenced in:
DFARS 252.204-7012
Derived From: NIST SP 800-53r4
CM-5
NIST Supplemental Guidance:
[SP 800-128]
Discussion:
Any changes to the hardware, software, or firmware components of systems can potentially have significant effects on the overall security of the systems. Therefore, organizations permit only qualified and authorized individuals to access systems for purposes of initiating changes, including upgrades and modifications.
Access restrictions for change also include software libraries. Access restrictions include physical and logical access control requirements, workflow automation, media libraries, abstract layers (e.g., changes implemented into external interfaces rather than directly into systems), and change windows (e.g., changes occur only during certain specified times). In addition to security concerns, commonly-accepted due diligence for configuration management includes access restrictions as an essential part in ensuring the ability to effectively manage the configuration.
[SP 800-128] provides guidance on configuration change control.
Upon assessment, assessors must determine if-
3.4.5[a] physical access restrictions associated with changes to the system are defined.
3.4.5[b] physical access restrictions associated with changes to the system are
documented.
3.4.5[c] physical access restrictions associated with changes to the system are
approved.
3.4.5[d] physical access restrictions associated with changes to the system are
enforced.
3.4.5[e] logical access restrictions associated with changes to the system are defined.
3.4.5[f] logical access restrictions associated with changes to the system are
documented.
3.4.5[g] logical access restrictions associated with changes to the system are approved.
3.4.5[h] logical access restrictions associated with changes to the system are enforced.
Assessors are instructed to-
Examine: [SELECT FROM: Configuration management policy; procedures addressing access restrictions for changes to the system; system security plan; configuration management plan; system design documentation; system architecture and configuration documentation; system configuration settings and associated documentation; logical access approvals; physical access approvals; access credentials; change control records; system audit logs and records; other relevant documents or records].
Interview: [SELECT FROM: Personnel with logical access control responsibilities; personnel with physical access control responsibilities; personnel with information security responsibilities; system or network administrators].
Test: [SELECT FROM: Organizational processes for managing access restrictions associated with changes to the system; mechanisms supporting, implementing, and enforcing access restrictions associated with changes to the system].