Check Point Advisories

3CX Phone System VAD_Deploy.aspx Arbitrary File Upload

Vulnerability
Protection

Check Point Reference:	CPAI-2016-1125
Date Published:	25 Dec 2016
Severity:	Critical
Last Updated:	Thursday 29 December, 2016
Source:	3CX
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	3CX Phone System v10 3CX Phone System v11
Vulnerability Description	An arbitrary file upload vulnerability exists in 3CX VoIP Phone System Manager. The vulnerability is due to failure to restrict file uploads in VAD_Deploy.aspx. A remote unauthenticated attacker can exploit this vulnerability by sending maliciously crafted requests to the target server.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the 3CX Phone System VAD_Deploy.aspx Arbitrary File Upload protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: 3CX Phone System VAD_Deploy.aspx Arbitrary File Upload