Insecure cross-domain.xml file

What is the "Insecure cross-domain.xml file?" module?

The "Insecure cross-domain.xml file" module is designed to detect a misconfiguration in the cross-domain.xml file of a website. This file is used to define the cross-domain policy for Flash-based applications. The module targets websites that have an insecure cross-domain.xml file, which can potentially expose sensitive information to unauthorized parties.

This module has an informative severity level, meaning it provides valuable information about the vulnerability but does not pose an immediate threat to the security of the website.

This module was authored by Borna Nematzadeh and nadino.

Impact

An insecure cross-domain.xml file can allow unauthorized access to sensitive data or resources on the website. By misconfiguring this file, an attacker may be able to bypass the intended security restrictions and perform unauthorized actions, potentially leading to data leakage or unauthorized access to resources.

How does the module work?

The "Insecure cross-domain.xml file" module works by sending a GET request to the "/crossdomain.xml" path of the target website. It then applies matching conditions to determine if the cross-domain.xml file is insecure.

The module checks for two specific conditions:

- The HTTP response status code must be 200, indicating a successful request. - The body of the response must contain the following XML code: <allow-access-from domain="*" />

If both conditions are met, the module identifies the cross-domain.xml file as insecure and reports it as a vulnerability.

Here is an example of the HTTP request sent by the module:

GET /crossdomain.xml

The module then analyzes the response to determine if the matching conditions are satisfied.

For more information about the "Insecure cross-domain.xml file" vulnerability, you can refer to the Acunetix website.