SI-4(22)—Unauthorized Network Services
HIGH
>Control Description
a
Detect network services that have not been authorized or approved by ⚙organization-defined authorization or approval processes; and
b
[Selection (one or more): Audit; Alert ⚙organization-defined personnel or roles] when detected.
>Cross-Framework Mappings
>Supplemental Guidance
Unauthorized or unapproved network services include services in service-oriented architectures that lack organizational verification or validation and may therefore be unreliable or serve as malicious rogues for valid services.
>Related Controls
>Assessment Interview Topics
Questions assessors commonly ask
Process & Governance:
- •What policies and procedures govern unauthorized network services?
- •Who is responsible for monitoring system and information integrity?
- •How frequently are integrity monitoring processes reviewed and updated?
Technical Implementation:
- •What technical controls detect and respond to unauthorized network services issues?
- •How are integrity violations identified and reported?
- •What automated tools support system and information integrity monitoring?
- •What anti-malware solutions are deployed and how are they configured?
Evidence & Documentation:
- •Can you provide recent integrity monitoring reports or alerts?
- •What logs demonstrate that SI-4(22) is actively implemented?
- •Where is evidence of integrity monitoring maintained and for how long?
- •Can you show recent malware detection reports and response actions?
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