Curl-url-http-3a-2f-2f169.254.169.254-2flatest-2fapi-2ftoken _hot_

The command curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"

Replace YOUR_TOKEN_HERE with the actual token received from the /latest/api/token endpoint. curl-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fapi-2Ftoken

The command curl -X PUT "http://169.254.169" is essential for generating a Session Token required to access Amazon Web Services (AWS) Instance Metadata Service Version 2 (IMDSv2). This method secures EC2 instance metadata access by mitigating Server-Side Request Forgery (SSRF) vulnerabilities, requiring a token rather than allowing direct, unauthenticated access. The command curl -X PUT "http://169

How IMDSv2 Works

Token retrieval: The instance first makes a PUT request to http://169.254.169.254/latest/api/token with a X-aws-ec2-metadata-token-ttl-seconds header (e.g., 21600 for 6 hours).
Token usage: The returned token is then included in subsequent metadata requests using the X-aws-ec2-metadata-token header.
Metadata access: With the token, the instance can access paths like /latest/meta-data/iam/security-credentials/role-name.

The server makes a request from its internal IP to the metadata service, retrieves the token, and potentially returns it in an error message or redirect. Token retrieval : The instance first makes a

-X PUT: IMDSv2 requires a PUT request to ensure that simple GET-based SSRF vulnerabilities cannot trigger a token generation.