Database credentials rotated per policy

Database credentials that are never rotated represent an indefinite exposure window: a breach discovered six months late, a departed employee, or a compromised developer machine may have leaked those credentials with no way to detect it retroactively. NIST IA-5 requires authenticator management including credential lifetime controls. PCI-DSS v4.0 Req-8.6.3 requires passwords/passphrases for application and system accounts to be changed periodically per a targeted risk analysis and protected against misuse — the correct control for database service-account credentials. CWE-522 covers insufficiently protected credentials, which includes stale credentials that cannot be revoked because no rotation process exists. Without documented last-rotation dates, you cannot demonstrate compliance or reason about the risk surface.

Document last rotation dates and next scheduled rotation for every database credential set. For managed database services, prefer automated rotation over manual processes.

# ROTATION_SCHEDULE.md
## Database Credentials
| Environment | Last rotated | Next due   | Method    |
|-------------|-------------|------------|----------|
| Production  | 2026-01-15  | 2026-04-15 | Manual   |
| Staging     | 2026-01-15  | 2026-04-15 | Manual   |

Enable automated rotation on AWS RDS:

aws rds modify-db-instance \
  --db-instance-identifier prod-db \
  --manage-master-user-password
# Rotates credentials in Secrets Manager automatically

Manual rotation process: Generate new password → update Secrets Manager → trigger a rolling deployment → verify connectivity → archive old password with deactivation date. Document each step with a timestamp.

• ID: db-credentials-rotated

• Severity: info

• What to look for: Check if a documented database credential rotation policy exists. Look for evidence of recent rotation: version history in secrets manager, old credentials marked as archived, or rotation logs.

• Pass criteria: Count all database credential sets and list their last rotation dates. A documented rotation policy exists (quarterly, monthly, etc.) and evidence shows recent rotation within at least 90 days of the policy interval.

• Fail criteria: No rotation policy, or last rotation was beyond policy interval (e.g., policy says quarterly but last rotation was 8 months ago).

• Skip (N/A) when: The project uses auto-rotating credentials (managed database services with auto-rotation enabled).

• Detail on fail: "No database credential rotation policy documented" or "Last database password rotation was 10 months ago; quarterly policy not followed".

• Remediation: Establish and document rotation:

  # ROTATION_SCHEDULE.md
  Database Credentials: Rotated quarterly
  - Last rotation: 2026-01-15
  - Next rotation: 2026-04-15
  - Process: Update secret in AWS Secrets Manager, test connection, update app deployment
  

  If using a managed database service (RDS, Cloud SQL), enable automated rotation:

  # AWS RDS
  aws rds modify-db-instance --db-instance-identifier mydb \
    --manage-master-user-password --enable-iam-database-authentication