SI 18(4) Individual Requests

---
name: "SI-18(4)_individual-requests"
description: "Correct or delete personally identifiable information upon request by individuals or their designated representatives."
category: "input-validation"
version: "5.2.0"
author: "cyberstrike-official"
tags:
  - nist
  - sp800-53
  - rev5
  - si-18-4
  - si
  - enhancement
tech_stack:
  - aws
  - azure
  - gcp
  - linux
  - windows
cwe_ids:
  - CWE-20
chains_with: []
prerequisites:
  - SI-18
severity_boost: {}
---

# SI-18(4) Individual Requests

> **Enhancement of:** SI-18

## High-Level Description

**Family:** System and Information Integrity (SI)
**Framework:** NIST SP 800-53 Rev 5

Inaccurate personally identifiable information maintained by organizations may cause problems for individuals, especially in those business functions where inaccurate information may result in inappropriate decisions or the denial of benefits and services to individuals. Even correct information, in certain circumstances, can cause problems for individuals that outweigh the benefits of an organization maintaining the information. Organizations use discretion when determining if personally identifiable information is to be corrected or deleted based on the scope of requests, the changes sought, the impact of the changes, and laws, regulations, and policies. Organizational personnel consult with the senior agency official for privacy and legal counsel regarding appropriate instances of correction or deletion.

## What to Check

- [ ] Verify SI-18(4) Individual Requests is documented in SSP
- [ ] Confirm control is operating effectively
- [ ] Review evidence of continuous monitoring for SI-18(4)
- [ ] Verify enhancement builds upon base control SI-18

## How to Test

### Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for SI-18(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 integrity monitoring | `cloud_audit_monitoring`       |
| AWS CLI         | Review GuardDuty/Inspector | `aws guardduty list-detectors` |

## Remediation Guide

### Control Statement

Correct or delete personally identifiable information upon request by individuals or their designated representatives.

### Implementation Guidance

Inaccurate personally identifiable information maintained by organizations may cause problems for individuals, especially in those business functions where inaccurate information may result in inappropriate decisions or the denial of benefits and services to individuals. Even correct information, in certain circumstances, can cause problems for individuals that outweigh the benefits of an organization maintaining the information. Organizations use discretion when determining if personally identifiable information is to be corrected or deleted based on the scope of requests, the changes sought, the impact of the changes, and laws, regulations, and policies. Organizational personnel consult with the senior agency official for privacy and legal counsel regarding appropriate instances of correction or deletion.

## Risk Assessment

| Finding                                      | Severity | Impact                                      |
| -------------------------------------------- | -------- | ------------------------------------------- |
| SI-18(4) Individual Requests not implemented | High     | System and Information Integrity            |
| SI-18(4) partially implemented               | Medium   | Incomplete System and Information Integrity |

## CWE Categories

| CWE ID | Title                     |
| ------ | ------------------------- |
| CWE-20 | Improper Input Validation |

## References

- [NIST SP 800-53 Rev 5 - SI-18(4)](https://csrc.nist.gov/projects/cprt/catalog#/cprt/framework/version/SP_800_53_5_1_1/home?element=si-18.4)
- [NIST SP 800-53A Rev 5 (Assessment Procedures)](https://csrc.nist.gov/pubs/sp/800/53/a/r5/final)
- [NIST SP 800-53 Rev 5 Full Catalog](https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final)

## Checklist

- [ ] Control documented in SSP
- [ ] Implementation evidence collected
- [ ] Operating effectiveness validated
- [ ] Continuous monitoring in place
- [ ] Related controls (none) reviewed