| name | CM-7(4)_unauthorized-software-deny-by-exception |
| description | Identify [organization-defined]; |
| category | configuration |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","cm-7-4","cm","enhancement"] |
| tech_stack | ["aws","azure","gcp","linux","windows"] |
| cwe_ids | ["CWE-16"] |
| chains_with | ["CM-6","CM-8","CM-10","PL-9","PM-5"] |
| prerequisites | ["CM-7"] |
| severity_boost | {"CM-6":"Chain with CM-6 for comprehensive security coverage","CM-8":"Chain with CM-8 for comprehensive security coverage","CM-10":"Chain with CM-10 for comprehensive security coverage"} |
CM-7(4) Unauthorized Software — Deny-by-exception
Enhancement of: CM-7
High-Level Description
Family: Configuration Management (CM)
Framework: NIST SP 800-53 Rev 5
Unauthorized software programs can be limited to specific versions or from a specific source. The concept of prohibiting the execution of unauthorized software may also be applied to user actions, system ports and protocols, IP addresses/ranges, websites, and MAC addresses.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for CM-7(4) implementation details. Verify the organization has documented how this control is satisfied.
Step 2: Validate Implementation
# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly
# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null
Step 3: Test Operating Effectiveness
Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.
Tools
| Tool | Purpose | Usage |
|---|
| cloud-audit-mcp | Check configuration baselines | cloud_audit_config |
| AWS CLI | Review Config rules | aws configservice describe-config-rules |
Remediation Guide
Control Statement
Identify [organization-defined];
Employ an allow-all, deny-by-exception policy to prohibit the execution of unauthorized software programs on the system; and
Review and update the list of unauthorized software programs [organization-defined].
Implementation Guidance
Unauthorized software programs can be limited to specific versions or from a specific source. The concept of prohibiting the execution of unauthorized software may also be applied to user actions, system ports and protocols, IP addresses/ranges, websites, and MAC addresses.