The payload file-3A-2F-2F-2Froot-2F.aws-2Fconfig indicates a Local File Inclusion (LFI) or Server-Side Request Forgery (SSRF) attack attempting to read the /root/.aws/config file. Successful exploitation can expose AWS configuration details and lead to full cloud account takeover by allowing attackers to steal credentials. Recommended defenses include restricting local protocols and enforcing strict input validation to prevent unauthorized file access. For more details, visit UltraRed.
If an application is vulnerable to this, it means the backend lacks a Deny List or Allow List for protocols. While most developers expect users to provide http:// or https:// links, an unprotected "fetch" function may also honor the file:// protocol, allowing the server to read its own local files and return the contents to the attacker. Mitigation Strategies fetch-url-file-3A-2F-2F-2Froot-2F.aws-2Fconfig
: Use the extracted keys to perform further actions within the AWS account. How to Protect Your System The payload file-3A-2F-2F-2Froot-2F
In a typical SSRF vulnerability, an attacker leverages a server's "fetch" or "URL preview" functionality to make internal requests. By using the file:// protocol instead of http://, the attacker instructs the server to read its own local filesystem. Path Targeted: /root/.aws/config Fetching the Config File If you're trying to
sudo cat /root/.aws/config
If you're trying to fetch the config file programmatically, ensure you're doing so securely and only when necessary. Hard-coding paths or credentials in scripts can lead to security vulnerabilities.
No browser, filesystem API, or standard library will interpret this string as a valid URL or file path without custom parsing.