SSRp

SSRp, which stands for Server-Side Request Forgery, is a web security vulnerability that occurs when a web application is able to fetch a remote resource without validating the user's input. This allows an attacker to coerce the application into sending crafted requests to an unexpected destination, even when protected by a firewall or VPN.

The SSRF vulnerability exploits the trust a web server places in requests originating from within its own network. Attackers can use SSRF to scan internal networks, access sensitive data, or even trigger actions on other internal services. The impact can range from information disclosure to complete system compromise, depending on the permissions and access the vulnerable server has.

Mitigation strategies for SSRF typically involve validating all user-supplied URLs. This includes checking the protocol, domain, and port of the requested resource. Implementing a deny-list of prohibited protocols and IP addresses, or an allow-list of permitted destinations, can also be effective. Furthermore, network segmentation and principle of least privilege for the web server can limit the potential damage of an SSRF attack. Regular security audits and penetration testing are crucial to identify and address SSRF vulnerabilities before they can be exploited.