Zimbra Collaboration Suite - Server-Side Request Forgery

What is the "Zimbra Collaboration Suite - Server-Side Request Forgery?"

The "Zimbra Collaboration Suite - Server-Side Request Forgery" module is designed to detect a vulnerability in the Zimbra Collaboration Suite (ZCS) software. ZCS is a popular collaboration platform used for email, calendaring, and file sharing. This module specifically targets a server-side request forgery (SSRF) vulnerability in ZCS.

This vulnerability allows remote unauthenticated attackers to manipulate the ZCS server to include content returned by third-party servers. It can be exploited to perform various malicious actions, such as accessing internal resources, bypassing security controls, or launching further attacks.

The severity of this vulnerability is classified as critical, indicating the potential for significant impact on the affected system.

Author: gy741

Impact

If successfully exploited, the "Zimbra Collaboration Suite - Server-Side Request Forgery" vulnerability can lead to unauthorized access to sensitive information, compromise of user accounts, and potential further exploitation of the affected system. It poses a significant risk to the confidentiality, integrity, and availability of the ZCS deployment.

How the module works?

The module works by sending a specific HTTP request to the ZCS server and analyzing the response. It checks for the presence of a particular SSRF vulnerability pattern in the server's behavior.

One example of an HTTP request template used by this module is:

GET /service/error/sfdc_preauth.jsp?session=s&userid=1&server=http://{%InteractionURL%}%23.salesforce.com/ HTTP/1.1
Host: {%Hostname%}
Accept: */*

This request is designed to trigger the SSRF vulnerability by injecting a malicious server URL. The module then evaluates the server's response to determine if the vulnerability is present.

The module uses matching conditions to identify the vulnerability. In this case, it checks for the presence of the "http" protocol in the server's response, indicating a potential SSRF vulnerability.

Note: The actual JSON definitions of the module are not shown here for simplicity.