Cloud Security
AWS Deploys Managed Policy to Quarantine Exposed IAM Credentials
AWS introduced the AWSCompromisedKeyQuarantine policy to automatically revoke IAM access keys found in public code or via GitHub secret scanning. The policy disables the keys, logs the action in CloudTrail, and notifies owners, allowing defenders to react swiftly. Security teams should enable the policy, monitor CloudTrail for quarantine events, and enforce least‑privilege IAM roles.
AWS has rolled out a new managed policy, AWSCompromisedKeyQuarantine, that automatically revokes IAM access keys when they are detected in public repositories or reported by GitHub’s secret‑scanning program.
What Happened
When AWS receives a notification that an access key has been exposed, the policy is applied to the user, the key is disabled, and a CloudTrail event is generated.
Impact on Organizations
Any organization that stores IAM keys in code or environment files is at risk. The policy protects accounts by preventing further use of compromised keys while alerting owners.
How AWS Neutralizes Credentials
- GitHub secret scanning identifies exposed keys in public repositories.
- AWS automatically attaches AWSCompromisedKeyQuarantine to the affected IAM user.
- The policy disables the key and records the action in CloudTrail.
Defender Actions
- Enable AWSCompromisedKeyQuarantine for all IAM users.
- Configure CloudTrail to log all key‑management events.
- Set up alerts for the policy’s quarantine events.
- Review IAM permissions to enforce least privilege.
Monitoring & Response Tips
Regularly parse CloudTrail logs for “AWSCompromisedKeyQuarantine” events and correlate them with GitHub secret‑scan alerts to confirm that keys have been quarantined and owners notified.
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