Check Point Advisories

Citrix Program Neighborhood Client Buffer Overflow (CVE-2005-3652)

Vulnerability
Protection

Check Point Reference:	CPAI-2005-348
Date Published:	29 Oct 2009
Severity:	High
Last Updated:	Thursday 29 October, 2009
Source:
Industry Reference:	CVE-2005-3652
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	The Citrix Program Neighborhood is the client software used to access applications, server desktops, and other content published by an administrator. All resources accessible from the client are stored on servers running the MetaFrame Presentation Server. These servers are generally set up in groups referred to as server farms on local area networks. Published resources are grouped together into application sets which the client may access. A remotely exploitable heap buffer overflow vulnerability exists in the Citrix Program Neighborhood product. The vulnerability is created by insufficient handling of malformed application set responses. This flaw may be exploited by malicious users to inject and execute arbitrary code on the target host. The client application will terminate as a result of an attack with unsuccessful code injection. This will result in a denial of service condition on the client side. In the case of a successful code injection and execution attack, the process flow of the client application will be diverted to attacker controlled code. In such a case, the behavior of the host is entirely dependent on the intention of the malicious code. The client application will also stop operating properly as a result of such an attack.

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 Citrix Program Neighborhood Client Buffer Overflow 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: Citrix ICA Protection Violation.
Attack Information: Citrix Program Neighborhood client buffer overflow