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

: Familiarize yourself with the instance metadata service and understand what information is available and how it can be used.

Whether you need the to force IMDSv2 across your infrastructure. : Familiarize yourself with the instance metadata service

You can also proactively test your own applications with a safe SSRF scanning tool like or Burp Suite’s SSRF detection using a collaborator URL. Never test on production without authorization. Never test on production without authorization

In an SSRF attack, an attacker tricks a web server into making a request on their behalf. If an attacker finds a way to make your server "fetch" a URL of their choosing, they will point it at http://169.254.169 . Why this is a "Critical" Risk: Why this is a "Critical" Risk: $url =

$url = $_GET['url']; $image = file_get_contents($url); echo "<img src='data:image/jpeg;base64," . base64_encode($image) . "'>";

The attacker uses these temporary credentials to act as the EC2 instance, allowing them to download data from S3 buckets, list resources, or escalate privileges. 4. Securing Your Infrastructure: IMDSv2

IMDSv2 requires a token-based authentication flow.