Fetch-url-http-3a-2f-2f169.254.169.254-2flatest-2fmeta Data-2fiam-2fsecurity Credentials-2f |verified| Online

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: An attacker wants to steal your instance's secret keys to gain unauthorized access to your AWS environment.

: Ensure that IAM roles have the least privilege necessary for the instance to function. This means only granting access to the resources that are needed.

The response from the metadata service might look similar to this:

http://169.254.169.254/latest/meta-data/iam/security-credentials/ This public link is valid for 7 days

The attacker configures their local command-line interface (CLI) using the stolen Access Key ID, Secret Access Key, and Token.

fetch-url-http://169.254.169.254/latest/meta-data/iam/security-credentials/

This address is only accessible from within the running virtual machine (EC2 instance).

AWS introduced to combat SSRF. IMDSv2 requires session‑oriented requests: a PUT request to obtain a token, which must then be used as a header in subsequent GET s. SSRF attacks that only perform simple GET requests (like most file_get_contents or curl without custom headers) will fail. Can’t copy the link right now

: To get the actual temporary keys (AccessKeyId, SecretAccessKey, and Token), you must append the role name returned by the first command to the end of the URL: Example: curl http://169.254.169 Troubleshooting Common Issues

If you have ever worked with Amazon EC2 instances, you have likely stumbled upon a mysterious IP address: 169.254.169.254 . This link-local address is the gateway to the – a critical but often misunderstood component of cloud infrastructure. The encoded string in our headline – fetch-url-http-3A-2F-2F169.254.169.254-2Flatest-2Fmeta data-2Fiam-2Fsecurity credentials-2F – decodes to a well‑known endpoint:

The address 169.254.169.254 is a . This is a special, non-routable IP address range ( ) that is not accessible from the public internet.

These credentials are temporary and rotate regularly, enhancing security by minimizing the window of opportunity for misuse. : Ensure that IAM roles have the least

The strange hyphens and percent‑encoded characters ( %3A for colon, %2F for slash) are URL encoding. When we decode the string, we get:

What generated this log (e.g., WAF, reverse proxy, custom application)?

Decoding the AWS Metadata Vulnerability: Understanding Server-Side Request Forgery (SSRF)