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CM.3.067
Content
Control Acronym
CM
Family
Configuration Management
CMMC Level
3
800-171 Control #
3.4.5
CMMC Description
Define, document, approve, and enforce physical and logical access restrictions associated with changes to organizational systems.
CMMC Clarification
Define, identify, and document qualified individuals authorized to have access and make physical and logical changes to the organization’s hardware, software, software libraries or firmware components. Control of configuration management activities may involve: * physical access control which prohibits unauthorized users from gaining physical access to an asset (e.g., requiring a special key card to enter a server room) * logical access control which prevents unauthorized users from logging onto a system to make configuration changes (e.g., requiring specific credentials for modifying configuration settings, patching software, or updating software libraries) * workflow automation in which configuration management workflow rules define human tasks and data or files are routed between people authorized to do configuration management based on pre-defined business rules (e.g., passing an electronic form to a manager requesting approval of configuration change made by an authorized employee) * an abstraction layer for configuration management that requires changes be made from an external system through constrained interface (e.g., software updates can only be made from a patch management system with a specific IP address) * utilization of a configuration management change window (e.g., software updates are only allowed between 8:00 AM and 10:00 AM or between 6:00PM and 8:00PM). Example 1 You are in charge of IT operations in your organization responsible for configuration management. You need to add an additional network storage appliance to a server farm. However, all of your organization's servers have been consolidated into a single data center that has locked doors. To gain access to that data center, you request and are granted a key card which allows you to enter the data center and modify the hardware configuration. Example 2 You are responsible for patching your organization's software as soon as new versions are released or when emergency patching is required. You configure the patch management system to push patches to all endpoints in the enterprise as soon as a patch or update is available, has been confirmed to have been received from the proper source, and has been validated.
800-171 Description
Define, document, approve, and enforce physical and logical access restrictions associated with changes to organizational systems.
800-171 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.
Other Source Discussion
N/A
CIS Control References
CIS Controls v7.1 2.5, 2.7, 2.8, 2.9, 4.3, 11.1, 11.3, 11.7
NIST 800-53 Control Ref.
NIST SP 800-53 Rev 4 CM-5
CMMC Derived
NIST CSF Control References
NIST 800-171 References
NIST SP 800-171 Rev 1 3.4.5
Applicable FAR Clause
NIST CSF Control Reference
NIST CSF v1.1 PR.IP-1
CERT RMM Reference
CERT RMM v1.2 TM:SG4.SP1
Modification of NIST 800-171B Reference
NIST 800-171B Reference
UK NCSCCyber Reference
UK NCSC Cyber Essentials
AS ACSC Reference
Sub-Criterias
Assessment Sub-Criteria 1
CM.3.067.[a] physical access restrictions associated with changes to the system are defined;
Assessment Sub-Criteria 2
CM.3.067.[b] physical access restrictions associated with changes to the system are documented;
Assessment Sub-Criteria 3
CM.3.067.[c] physical access restrictions associated with changes to the system are approved;
Assessment Sub-Criteria 4
CM.3.067.[d] physical access restrictions associated with changes to the system are enforced;
Assessment Sub-Criteria 5
CM.3.067.[e] logical access restrictions associated with changes to the system are defined;
Assessment Sub-Criteria 6
CM.3.067.[f] logical access restrictions associated with changes to the system are documented;
Assessment Sub-Criteria 7
CM.3.067.[g] logical access restrictions associated with changes to the system are approved; and
Assessment Sub-Criteria 8
CM.3.067.[h] logical access restrictions associated with changes to the system are enforced.