CMMC Navigatorby Foxx Cyber Bedrock CMMC

↑↓ to move, Enter to open, Esc to close. Try 3.5.3, AC.L2-3.1.1, MFA or unmarked.

3.7.5Require MFA for remote maintenance, and hang up after

Remote maintenance sessions use MFA and are terminated when finished.

The requirement, verbatim

NIST SP 800-171 Rev. 2 · 3.7.5

Require multifactor authentication to establish nonlocal maintenance sessions via external network connections and terminate such connections when nonlocal maintenance is complete.

Requirement 3.7.5, practice name in the CMMC assessment guide: Nonlocal Maintenance.

NIST's discussion

Nonlocal maintenance and diagnostic activities are those activities conducted by individuals communicating through an external network. The authentication techniques employed in the establishment of these nonlocal maintenance and diagnostic sessions reflect the network access requirements in IA.L2-3.5.3.

NIST SP 800-171 Rev. 2, discussion under 3.7.5. Whitespace normalised; wording unchanged.

Assessment objectives

An assessor decides each of these separately. The requirement is met only when every objective is.

  1. [a] nonlocal maintenance sessions are established via secure connections
  2. [b] multifactor authentication is used to establish nonlocal maintenance sessions via external network connections
  3. [c] nonlocal maintenance sessions are terminated when nonlocal maintenance is complete

NIST SP 800-171A, determination statements for 3.7.5.

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 maintenance policy
  • procedures addressing nonlocal system maintenance
  • system security plan
  • system design documentation
  • system configuration settings and associated documentation
  • maintenance records
  • diagnostic records
  • other relevant documents or records
Interview
  • Personnel with system maintenance responsibilities
  • personnel with information security responsibilities
  • system or network administrators
Test
  • Organizational processes for managing nonlocal maintenance
  • mechanisms implementing, supporting, and managing nonlocal maintenance
  • mechanisms for strong authentication of nonlocal maintenance diagnostic sessions
  • mechanisms for terminating nonlocal maintenance sessions and network connections

NIST SP 800-171A, potential assessment methods and objects for 3.7.5.

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 5 points. Not meeting this requirement subtracts 5 from your 110-point SPRS score. These are the requirements with the largest effect on your posture.

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 reworded: 03.07.05 Nonlocal Maintenance.

See the Rev. 2 and Rev. 3 wording word by word, or start with the status page.

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)