Is your application currently deployed on , containers (Docker/Kubernetes) , or a different platform ?
: Never trust user-supplied filenames or paths. Use a "whitelist" of allowed characters and strictly block sequences like ../ or encoded variations.
Do run your web application as root or a user that has access to home directories. The web server user (e.g., www-data ) should not be able to read /home/*/.aws/credentials . Even better, use containerization or virtualization to isolate the application from sensitive host files. -file-..-2F..-2F..-2F..-2Fhome-2F-2A-2F.aws-2Fcredentials
[default] aws_access_key_id = AKIAIOSFODNN7EXAMPLE aws_secret_access_key = wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
Make sure to also decode URL‑encoded sequences. Is your application currently deployed on , containers
-file-../../../home/*/.aws/credentials
Preventing this attack requires securing both your application code and your cloud infrastructure architecture. 1. Input Validation and Sanitization Do run your web application as root or
: This is the specific target file containing Amazon Web Services (AWS) access keys.
If your application must take file paths from users, validate them rigorously. Do not allow .. or / in user-supplied input. Use strict allowlists for file names rather than filterlists for dangerous characters. 3. Apply the Principle of Least Privilege
| Component | URL Encoded | Decoded | Purpose | |-----------|-------------|---------|---------| | Traversal | ..-2F | ../ | Directory escape | | Target | home-2F-2A | home/* | Wildcard directory match | | File | .aws-2Fcredentials | .aws/credentials | AWS credential file |
: Ensure your application does not allow users to provide paths that contain ../ or encoded equivalents.