Callback-url-file-3a-2f-2f-2fhome-2f-2a-2f.aws-2fcredentials

Understanding the Mysterious Callback URL: /home/*/.aws/credentials

1. Serverless applications: In a serverless architecture, the callback URL could be used to authenticate requests to AWS services, such as API Gateway or S3.
2. EC2 instance authentication: When launching an EC2 instance, the callback URL might be used to retrieve temporary security credentials for the instance.

Black Hat

: You can find the presentation materials under the title "The Cloud is Dark and Full of Terrors" (JFrog researchers, Black Hat USA 2023).

• You should never share or expose your AWS access keys and secret keys publicly, as they grant access to your AWS resources.
• The * in the path you provided seems to be a wildcard, possibly indicating any user's home directory.

Server-Side Request Forgery (SSRF)

This pattern is typically associated with or Redirect-based data exfiltration vulnerabilities. An attacker might try to use this as a "callback URL" in a misconfigured application to trick the server into reading its own local sensitive files and sending them to an external location. Guide to Preventing Local File Exfiltration via Callbacks callback-url-file-3A-2F-2F-2Fhome-2F-2A-2F.aws-2Fcredentials