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

Because the request comes from inside the instance, it bypasses external firewalls and WAFs.

: This is the base URL for the AWS Instance Metadata Service. The IP address 169.254.169.254 is a special IP address that is reserved for this service and can only be accessed from within an EC2 instance.

When an AWS EC2 instance is assigned an Identity and Access Management (IAM) role, AWS temporary security credentials are automatically attached to it. The operating system fetches these keys from the following path: Because the request comes from inside the instance,

Get the full benefits of IMDSv2 and disable IMDSv1 ... - AWS

The string is a URL-encoded log signature indicating a critical Server-Side Request Forgery (SSRF) attack targeting AWS Instance Metadata Services to steal AWS IAM security credentials. Understanding the Attack Vector: AWS Metadata Exploitation When an AWS EC2 instance is assigned an

If you suspect an SSRF attack has already succeeded, look for these indicators:

You can restrict your EC2 instances to only use IMDSv2 by setting the to Required in the AWS Console or via the AWS CLI. 5. Summary Table: Metadata Endpoints Endpoint / Action Meta-data Root AdministratorAccess ) to an instance.

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Apply the . Do not attach overly permissive roles (e.g., AdministratorAccess ) to an instance. Use AWS managed policies or custom policies that grant only the required actions on specific resources.