Preventing SSRF Attacks

Server-Side Request Forgery (SSRF) is a critical web security vulnerability. It tricks a server into making requests to an unintended location, often internal resources or other external services.

Imagine your backend application acts as a proxy, fetching data or resources on behalf of a user. If an attacker can control the destination of these requests, you have an SSRF vulnerability.

Here's how SSRF typically works:

• Your application accepts a URL from a user.
• The server then makes a request to that URL to fetch data (e.g., an image, a file, a webpage).
• An attacker provides a malicious URL, pointing to an internal IP address or a sensitive service.
• The server, trusting the input, makes the request, potentially exposing internal data or services.