When you query http://169.254.169.254/latest/meta-data/iam/security-credentials/ , the service returns a list of IAM role names associated with the EC2 instance.
: Familiarize yourself with the instance metadata service and understand what information is available and how it can be used. When you query http://169
: This is a special IP address that is not routable on the public internet. It is an IP address that AWS instances automatically recognize as the "metadata service". When an instance is launched in AWS, it can access this IP address to get information about itself. It is an IP address that AWS instances
The address 169.254.169.254 is a used by Amazon Web Services (AWS) to provide the Instance Metadata Service (IMDS) . Every EC2 instance can "talk" to this IP to learn about itself without needing an external internet connection. Every EC2 instance can "talk" to this IP
The encoded keyword fetch-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta-data-2Fiam-2Fsecurity-credentials-2F is more than just an odd string—it is a fingerprint of a dangerous attack pattern. It represents a single HTTP request that can turn a minor application flaw into a catastrophic data breach.
Stay secure, and always treat metadata as top‑secret data – because in the cloud, it is.
Understanding SSRF and the AWS Instance Metadata Service The string fetch-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta data-2Fiam-2Fsecurity credentials-2F represents a URL-encoded payload designed to exploit Server-Side Request Forgery (SSRF) vulnerabilities [1].