Callback-url-http-3a-2f-2f169.254.169.254-2flatest-2fmeta: Data-2fiam-2fsecurity Credentials-2f ((top))

: Applications running on EC2 instances should handle these temporary credentials securely, avoiding any form of insecure storage or transmission.

: This is a link-local address used by cloud providers for metadata services. : Applications running on EC2 instances should handle

With those credentials, an attacker can: One such URL that holds significant importance is http://169

In the realm of cloud computing, particularly within Amazon Web Services (AWS), callback URLs play a pivotal role in securely exchanging information between services. One such URL that holds significant importance is http://169.254.169.254/latest/meta-data/iam/security-credentials/ . This essay aims to elucidate the purpose, functionality, and security aspects of this specific callback URL, shedding light on its critical role in cloud infrastructure. Never allow arbitrary URLs in callback parameters

After URL decoding, this string translates to:

: The vulnerable server, thinking it is fetching a legitimate resource, makes an internal HTTP request to the metadata IP.

Never allow arbitrary URLs in callback parameters. Implement a strict allowlist of approved domains and protocols (e.g., only