Check Point Advisories

SonicWALL SSL VPN End Point Interrogator Installer ActiveX Control

Vulnerability
Protection

Check Point Reference:	CPAI-2010-164
Date Published:	20 Sep 2010
Severity:	High
Last Updated:	Monday 20 September, 2010
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	SonicWALL SSL VPN provides secure remote access to mission-critical resources from any endpoint including desktops, laptops, PDAs and smartphones. SonicWALL SSL VPN is bundled with a number of ActiveX controls such as, EPInstaller (End Point Installer) and EPInterrogator (End Point Interrogator), that are included in the epi.dll library. A remote code execution vulnerability has been discovered in SonicWALL SSL-VPN End-Point Interrogator/Installer ActiveX controls. The vulnerability is due to a format string error in the "epi.dll" library when creating a log message. This can be exploited by assigning a specially crafted string value to affected properties of the ActiveX control. A remote attacker could exploit this vulnerability by enticing target users to visit a crafted web page. Successful exploitation would result in arbitrary code execution in the context of the logged on user.

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 SonicWALL SSL VPN End Point Interrogator Installer ActiveX Control 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 Client Enforcement Violation.
Attack Information: SonicWALL SSL VPN End Point interrogator installer ActiveX control