Check Point Advisories

Multiple Products libxml2 XML File Processing Entity Name Buffer Overflow (CVE-2008-3529)

Vulnerability
Protection

Check Point Reference:	CPAI-2008-342
Date Published:	1 Feb 2010
Severity:	High
Last Updated:	Tuesday 20 November, 2012
Source:
Industry Reference:	CVE-2008-3529
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A vulnerability has been reported in libxml2 that could allow remote attackers to execute arbitrary code on the vulnerable system.The vulnerability is due to a boundary error within the Libxml2, specifically in the way libxml2 handles long XML entity names. Remote attackers could exploit this vulnerability by persuading a target user to open a specially crafted XML file. As a result of processing the malicious file a heap-based buffer overflow can be triggered. In an attack case where code injection is successful, the behaviour of the target 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 logged in user. In an attack case where code injection is not successful, the affected process will terminate abnormally.

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 Multiple Products libxml2 XML File Processing Entity Name 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: Content Protection Violation.
Attack Information: Multiple products libxml2 XML file processing entity name buffer overflow