Use firewalls and network segmentation to prevent unexpected outbound traffic from your application. Conclusion
When you launch a virtual server (an EC2 instance) in AWS, you often need that server to perform actions—such as uploading files to S3 or writing logs to CloudWatch. To do this, the server needs permissions.
The URL http://169.254.169 serves as a stark reminder of the "trust but verify" dilemma in cloud architecture. While metadata services are essential for automation, they represent a high-value target. Modern security dictates a defense-in-depth strategy: enforcing IMDSv2, applying the principle of least privilege to IAM roles, and rigorously sanitizing any input that accepts a callback URL. Use firewalls and network segmentation to prevent unexpected
What is Azure Active Directory? A Complete Overview - Varonis
attacks to steal sensitive credentials from cloud environments, specifically Amazon Web Services (AWS) What This URL Does This specific path targets the AWS Instance Metadata Service (IMDS) IP Address (169.254.169.254): The URL http://169
The most effective mitigation is to move from IMDSv1 to . Unlike v1, which only requires a simple HTTP request, IMDSv2 requires a session-oriented token, which mitigates many common SSRF vulnerabilities.
If the backend server executes this request and returns the response to the user, the attacker will first see the name of the IAM role. Appending that role name to the URL allows the attacker to retrieve the temporary access key, secret key, and session token belonging to that role. The Impact of IMDSv1 vs. IMDSv2 What is Azure Active Directory
Detail the needed to test for this vulnerability . Suggest monitoring strategies to detect this in logs. Let me know which area you'd like to dive into! Share public link
The attacker then requests the specific path for that role: http://169.254.169.254/latest/meta-data/iam/security-credentials/MyAppInstanceRole . The response is a JSON object containing the AccessKeyId , SecretAccessKey , and Token .