Get the full benefits of IMDSv2 and disable IMDSv1 ... - AWS
To understand why this command is heavily monitored by security professionals, it helps to understand how cloud metadata retrieval evolved. The Vulnerability of IMDSv1
This command is essential for securely interacting with the on Amazon Elastic Compute Cloud (EC2) instances. In this article, we will explore everything you need to know about this command – what it does, why it matters, how to use it correctly, and the security best practices that surround it. curl-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fapi-2Ftoken
Based on the specific encoded format in your request ( http%3A%2F%2F169.254.169.254... ), this is often used in scenarios or security challenges like the Wiz Cloud Security Championship . If you are accessing it through a proxy endpoint, the command looks like this:
Use firewall rules (security groups) to block outbound traffic to 169.254.169.254 from non-admin instances. But note: this may break legitimate cloud-init processes. Get the full benefits of IMDSv2 and disable IMDSv1
aws ec2 modify-instance-metadata-options \ --instance-id i-0123456789abcdef0 \ --http-tokens required \ --http-endpoint enabled Use code with caution. Global Enforcement Using IAM Policies
: Even if an attacker can execute a GET request through your app, they cannot easily perform the PUT handshake required to get a token. Conclusion In this article, we will explore everything you
"eventName": "GetObject", "sourceIPAddress": "169.254.169.254", "userAgent": "curl/7.68.0", "errorCode": "AccessDenied"
The X-aws-ec2-metadata-token-ttl-seconds header defines how long (in seconds) the token remains valid. The maximum allowed limit is 6 hours (21,600 seconds). 4. Why is this Keyword Showing Up in Your Logs?