Check Point Advisories

IBM Informix Client NFX Buffer Overflow - Ver2 (CVE-2009-3691)

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0718
Date Published:	18 May 2015
Severity:	High
Last Updated:	Monday 18 May, 2015
Source:
Industry Reference:	CVE-2009-3691
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A buffer overflow vulnerability has been reported in IBM Informix Client Software Development Kit and Ibm Informix Connect Runtime. An attacker could exploit this vulnerability via a .nfx file with a crafted HostSize, and possibly ProtoSize and ServerSize, field that triggers a stack-based buffer overflow involving a crafted HostList field. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system or cause application crashes.

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 IBM Informix Client NFX Buffer Overflow - Ver2 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: IBM Protection Violation.
Attack Information: IBM Informix Client NFX Buffer Overflow - Ver2