Request-url-http-3a-2f-2f169.254.169.254-2flatest-2fmeta Data-2fiam-2fsecurity - Credentials-2f !!link!!

A image-processing service that lets users provide a URL to fetch an image. The server blindly fetches the URL — and the attacker gives the metadata endpoint. 2. Log Injection & Exposure Developers sometimes log HTTP requests for debugging. If a request to the metadata service is accidentally logged (e.g., via console.log or logging proxy), the credentials may end up in log files, error reporting systems, or even client-side code. 3. Command Injection If a server-side script executes shell commands that include user input, an attacker might inject:

TOKEN=$(curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600") curl -H "X-aws-ec2-metadata-token: $TOKEN" http://169.254.169.254/latest/meta-data/iam/security-credentials/ SSRF via http:// GET request cannot retrieve the token first. 2. Disable Metadata Access (if not needed) In some cases, instances don’t need IMDS at all. Disable it via instance metadata options. 3. Network-Level Blocking Use host-based firewalls (iptables, nftables) to restrict access to 169.254.169.254 to only trusted processes, or block it entirely. A image-processing service that lets users provide a

Example:

curl http://169.254.169.254/latest/meta-data/iam/security-credentials/my-role-name The response might look like: Log Injection & Exposure Developers sometimes log HTTP

Remember: in cloud security, . Have you encountered this metadata endpoint in an unexpected place? Share your experience — and check your WAF logs today. Command Injection If a server-side script executes shell