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

The IMDSv2 workflow is a two-step process:

Perhaps the most infamous example is the 2019 Capital One data breach, which exposed the personal information of over 100 million customers. An attacker exploited a misconfigured Web Application Firewall (WAF) that was vulnerable to SSRF. Through the SSRF, they queried the IMDS endpoint, retrieved the IAM credentials associated with the EC2 instance, and used them to exfiltrate massive amounts of data from an S3 bucket.

The pattern http-3A-2F-2F is a dead giveaway: The IMDSv2 workflow is a two-step process: Perhaps

Historically, any process running on the server could query this IP to get information about the instance without providing a password or API key. Decoding the URL Pathway

To neutralize this structural vulnerability, AWS introduced , which adds session-oriented defense-in-depth: Security Feature Authentication Request Direct HTTP GET Token-based (HTTP PUT first) Session Control Requires local X-aws-ec2-metadata-token header SSRF Resistance Low (Vulnerable to basic GET requests) High (Token request blocks unauthorized SSRF) Network Hop Limit Default token hop limit blocks container SSRF The pattern http-3A-2F-2F is a dead giveaway: Historically,

Server Side Request Forgery (SSRF) remains one of the most critical vulnerabilities in cloud environments. A common target for these attacks is the AWS Instance Metadata Service (IMDS). When you see a request URL like 169.254.169, it is a clear sign that someone is attempting to extract sensitive IAM role information from a cloud instance. What is the 169.254.169.254 IP Address?

Only allow requests to a pre-approved list of domains. When you see a request URL like 169

: This final part of the path specifies that the request is looking for IAM (Identity and Access Management) security credentials. IAM is a service that enables AWS customers to manage access to AWS resources.

Here is a comprehensive guide to understanding this URL, how it works, the security risks associated with it, and how to protect your infrastructure. What is 169.254.169.254?

: AWS responds with a JSON document containing the temporary security credentials (Access Key ID, Secret Access Key, and Session Token) associated with the IAM role assigned to the instance.

Use the AWS SDK features or modify the instance metadata options to restrict the .