3.14.5Scan on schedule and in real time

Periodic full scans plus real-time scanning of files as they arrive.

SI
Level 1
3 pt
Rev. 3: Withdrawn and incorporated elsewhere

The requirement, verbatim

NIST SP 800-171 Rev. 2 · 3.14.5
Perform periodic scans of organizational systems and real-time scans of files from external sources as files are downloaded, opened, or executed.

Requirement 3.14.5, practice name in the CMMC assessment guide: System & File Scanning.

NIST's discussion

Periodic scans of organizational systems and real-time scans of files from external sources can detect malicious code. Malicious code can be encoded in various formats (e.g., UUENCODE, Unicode), contained within compressed or hidden files, or hidden in files using techniques such as steganography. Malicious code can be inserted into systems in a variety of ways including web accesses, electronic mail, electronic mail attachments, and portable storage devices. Malicious code insertions occur through the exploitation of system vulnerabilities.

NIST SP 800-171 Rev. 2, discussion under 3.14.5. Whitespace normalised; wording unchanged.

Assessment objectives

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

[a] periodic scans of the system are performed
[b] real-time scans of files from external sources as files are downloaded, opened, or executed are performed

NIST SP 800-171A, determination statements for 3.14.5.

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 and information integrity policy
configuration management policy and procedures
procedures addressing malicious code protection
malicious code protection mechanisms
records of malicious code protection updates
system security plan
system design documentation
system configuration settings and associated documentation
scan results from malicious code protection mechanisms
record of actions initiated by malicious code protection mechanisms in response to malicious code detection
system audit logs and records
other relevant documents or records

Interview

System or network administrators
personnel with information security responsibilities
personnel installing, configuring, and maintaining the system
personnel with responsibility for malicious code protection
personnel with configuration management responsibility

Test

Organizational processes for employing, updating, and configuring malicious code protection mechanisms
organizational process for addressing false positives and resulting potential impact
mechanisms supporting or implementing malicious code protection mechanisms (including updates and configurations)
mechanisms supporting or implementing malicious code scanning and subsequent actions

NIST SP 800-171A, potential assessment methods and objects for 3.14.5.

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 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 withdrawn and incorporated elsewhere: 03.14.02 Malicious Code Protection.

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)