ac-4-31-failed-content-transfer-prevention

name	AC-4(31)_failed-content-transfer-prevention
description	When transferring information between different security domains, prevent the transfer of failed content to the receiving domain.
category	authorization
version	5.2.0
author	cyberstrike-official
tags	["nist","sp800-53","rev5","ac-4-31","ac","enhancement"]
tech_stack	["aws","azure","gcp","linux","windows"]
cwe_ids	["CWE-284"]
chains_with	[]
prerequisites	["AC-4"]
severity_boost	{}

AC-4(31) Failed Content Transfer Prevention

Enhancement of: AC-4

High-Level Description

Family: Access Control (AC) Framework: NIST SP 800-53 Rev 5

Content that failed filtering checks can corrupt the system if transferred to the receiving domain.

What to Check

• Verify AC-4(31) Failed Content Transfer Prevention is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for AC-4(31)
• Verify enhancement builds upon base control AC-4

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for AC-4(31) 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 IAM policies and access controls	cloud_audit_iam_policies
hackbrowser-mcp	Test web application access controls	browser_auth_test

Remediation Guide

Control Statement

When transferring information between different security domains, prevent the transfer of failed content to the receiving domain.

Implementation Guidance

Content that failed filtering checks can corrupt the system if transferred to the receiving domain.

Risk Assessment

Finding	Severity	Impact
AC-4(31) Failed Content Transfer Prevention not implemented