Check Point Advisories

Microsoft Agent Crafted URL Stack Buffer Overflow (MS07-051; CVE-2007-3040)

Vulnerability
Protection

Check Point Reference:	CPAI-2007-320
Date Published:	28 Jan 2010
Severity:	High
Last Updated:	Sunday 14 February, 2016
Source:
Industry Reference:	CVE-2007-3040
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	The Microsoft Agent ActiveX control, exposes a set of methods and properties that can be used for scripting in HTML pages. There exists a buffer overflow vulnerability in Microsoft Windows Agent application. The flaw is due to wrongfully copying an overly large string to a fixed-size stack buffer within the code of agentdpv.dll Dynamic Link Library. By persuading the target user to open a malicious web page, an attacker may execute arbitrary code on the target system within the privileges of the currently logged on user. Note that although this vulnerability is exploited normally through a browser, e.g. Internet Explorer, the affected application is the Microsoft Agent application. In an attack case where code injection is not successful, the affected application will terminate abnormally. In a more sophisticated attack where code injection is successful, the behavior of the target host is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security context of the currently logged in 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 Microsoft Agent Crafted URL Stack Buffer Overflow (MS07-051) 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: Microsoft Agent crafted URL stack buffer overflow (MS07-051)