Check Point Advisories

nginx URI Parsing Buffer Underflow (CVE-2009-2629)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-425
Date Published:	31 Jan 2010
Severity:	High
Last Updated:	Wednesday 08 July, 2015
Source:
Industry Reference:	CVE-2009-2629
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A remote buffer underflow vulnerability exists within nginx HTTP server. The vulnerability is due to an error when processing malicious HTTP requests. A remote attacker can exploit this vulnerability by sending an HTTP request containing specially crafted URI to the target system. Successful exploitation of this vulnerability can lead to arbitrary code execution within the security context of the affected service. An unsuccessful code execution attempt can lead to abnormal termination of the vulnerable program.

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 nginx URI Parsing Buffer Underflow 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 Server Enforcement Violation.
Attack Information: nginx URI parsing buffer underflow