3.8.2Limit who can reach CUI on media
Access to CUI on media is restricted to authorized users.
The requirement, verbatim
NIST SP 800-171 Rev. 2 · 3.8.2Limit access to CUI on system media to authorized users.
NIST's discussion
Access can be limited by physically controlling system media and secure storage areas. Physically controlling system media includes conducting inventories, ensuring procedures are in place to allow individuals to check out and return system media to the media library, and maintaining accountability for all stored media. Secure storage includes a locked drawer, desk, or cabinet, or a controlled media library.
NIST SP 800-171 Rev. 2, discussion under 3.8.2. Whitespace normalised; wording unchanged.
Assessment objectives
An assessor decides each of these separately. The requirement is met only when every objective is.
- [a] access to CUI on system media is limited to authorized users
NIST SP 800-171A, determination statements for 3.8.2.
For assessors: examine, interview, test
NIST SP 800-171A names what an assessor may examine, whom they may interview, and what they may test for this requirement. Assessors select from these lists; they are not a checklist of everything you must produce.
Examine
- System media protection policy
- procedures addressing media storage
- physical and environmental protection policy and procedures
- access control policy and procedures
- system security plan
- system media
- designated controlled areas
- other relevant documents or records
Interview
- Personnel with system media protection and storage responsibilities
- personnel with information security responsibilities
Test
- Organizational processes for storing media
- mechanisms supporting or implementing secure media storage and media protection
NIST SP 800-171A, potential assessment methods and objects for 3.8.2.
Evidence
No evidence examples are published for this requirement yet. The objectives above are what an assessor checks; evidence is whatever shows each one is true in your environment, dated and kept with your system security plan.
Scoring weight
Worth 3 points. Not meeting this requirement subtracts 3 from your 110-point SPRS score.
DoD NIST SP 800-171 Assessment Methodology v1.2.1 weighting, as carried in the Bedrock scoring table. The score starts at 110 and subtracts the weight of every requirement not met.
In Rev. 3
Rev. 2 is what your contract requires today. A standing DoD class deviation keeps Rev. 2 in force; NIST has published Rev. 3, but it is not adopted for contracts. In Rev. 3 this requirement is no significant change: 03.08.02 Media Access.
See the Rev. 2 and Rev. 3 wording word by word, or start with the status page.
Related requirements
Where this page's facts come from
- Requirement text
- bedrock-cmmc-api@89b8e8e:migrations/004_reference_requirements.sql#Requirement.basicRequirement@rev2
- Discussion
- bedrock-cmmc-api@89b8e8e:migrations/004_reference_requirements.sql#Requirement.discussion@rev2
- Practice name
- bedrock-cmmc-api@89b8e8e:migrations/004_reference_requirements.sql#Requirement.title@rev2 (CMMC Assessment Guide practice name)
- Objectives
- bedrock-cmmc-api@89b8e8e:migrations/005_reference_objectives.sql#AssessmentObjective.description@rev2
- Examine, interview, test
- bedrock-cmmc-api@89b8e8e:migrations/005_reference_objectives.sql#AssessmentObjective.description@rev2 ({examineGuidance, interviewGuidance, testGuidance})
- Level
- bedrock-cmmc-api@89b8e8e:migrations/021_fix_level1_requirements.sql#Requirement.cmmcLevel@rev2
- Weight
- bedrock-cmmc-api@89b8e8e:internal/cmmc/requirement_values.go#requirementValues (DoD AM v1.2.1 / eMASS L2 template v3.8)
- Rev. 3 mapping
- bedrock-cmmc-api@89b8e8e:docs/reference/nist-800-171-rev3/normalized/r2_r3_transition_map.json#r2_to_r3
- Plain-language title and summary
- editorial/CMMC Navigator.dc.html#RAW (Foxx Cyber editorial)