This will typically involve supplying a URL with a hostname like 127.0.0.1 (a reserved IP address that points to the loopback adapter) or localhost (a commonly used name for the same adapter).įor example, consider a shopping application that lets the user view whether an item is in stock in a particular store. In an SSRF attack against the server itself, the attacker induces the application to make an HTTP request back to the server that is hosting the application, via its loopback network interface. These trust relationships might exist in relation to the server itself, or in relation to other back-end systems within the same organization. SSRF attacks often exploit trust relationships to escalate an attack from the vulnerable application and perform unauthorized actions.

In some situations, the SSRF vulnerability might allow an attacker to perform arbitrary command execution.Īn SSRF exploit that causes connections to external third-party systems might result in malicious onward attacks that appear to originate from the organization hosting the vulnerable application. View all SSRF labs What is the impact of SSRF attacks?Ī successful SSRF attack can often result in unauthorized actions or access to data within the organization, either in the vulnerable application itself or on other back-end systems that the application can communicate with. If you're already familiar with the basic concepts behind SSRF vulnerabilities and just want to practice exploiting them on some realistic, deliberately vulnerable targets, you can access all of the labs in this topic from the link below.

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