The URL provided is: http://169.254.169.254/latest/meta-data/iam/security-credentials/
The string callback-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta data-2Fiam-2Fsecurity credentials-2F is a URL-encoded payload typically used in Server-Side Request Forgery (SSRF) attacks. It targets the cloud instance metadata service (IMDS) to steal sensitive AWS credentials. What is the AWS Metadata Service? URL Breakdown
The URL provided is: http://169
A special internal address accessible only from within an EC2 instance. /latest/meta-data/iam/security-credentials/ This directory lists the IAM roles attached to the server. The instance then queries the full path, appending
The Payload: If an attacker appends the role name to this URL (e.g., .../security-credentials/admin-role), the service returns a JSON object containing a Secret Access Key, Access Key ID, and a Token. How the Attack Works What is happening
.../security-credentials/MyEC2Role).AccessKeyId, a SecretAccessKey, and a SessionToken.What is happening?This string indicates an attempt to exploit an SSRF vulnerability. The IP address 169.254.169.254 is a link-local address used by AWS to provide instance metadata to EC2 instances. When an application is vulnerable to SSRF, an attacker can force the server to call this internal URL and return the temporary IAM credentials (AccessKeyId, SecretAccessKey, and SessionToken) assigned to that server.
. An attacker who obtains these temporary security credentials can: Impersonate the server's IAM role.
Whether you are a security engineer, DevSecOps lead, or cloud architect, treat the metadata service as a live grenade. Apply IMDSv2, enforce strict network rules, and monitor for any attempts to access 169.254.169.254. The convenience of automatic credentials should never come at the cost of an unlocked front door to your entire cloud infrastructure.