Here's a step-by-step overview of how the http://169.254.169.254/latest/meta-data/iam/security-credentials/ URL works:
| Action | Why | |--------|-----| | | It would leak credentials if run on an EC2 instance. | | Block outbound requests to 169.254.169.254 | Prevent SSRF attacks at network level. | | Disable IMDSv1 | Enforce IMDSv2 (requires session token). | | Review any callback/ webhook feature | Ensure it doesn’t allow arbitrary URLs. | | Rotate IAM credentials if exposed | Assume compromise if the callback was triggered. | Here's a step-by-step overview of how the http://169
The URL string callback-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta data-2Fiam-2Fsecurity credentials-2F represents a URL-encoded payload frequently used by security researchers, attackers, and automated vulnerability scanners. Decoded, it points directly to http://169.254.169 . This specific path targets the Instance Metadata Service (IMDS) of Amazon Web Services (AWS). When an application exposes a callback URL parameter that can be manipulated to request this address, it introduces a critical vulnerability known as Server-Side Request Forgery (SSRF). What is the 169.254.169.254 IP Address? | | Review any callback/ webhook feature |
callback-url-http://169.254.169.254/latest/meta-data/iam/security-credentials/ Decoded, it points directly to http://169
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