Check Point Advisories

Squid Proxy ESI Component Stack Buffer Overflow (CVE-2016-4054)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0482
Date Published:	15 Jun 2016
Severity:	Medium
Last Updated:	Tuesday 06 September, 2016
Source:	Squid Project SQUID-2016:6
Industry Reference:	CVE-2016-4054
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Squid Project Squid 3.x prior to 3.5.17 Squid Project Squid 4.x prior to 4.0.9
Vulnerability Description	A stack-based buffer overflow vulnerability has been reported in the Edge Side Includes (ESI) component of the Squid proxy. The vulnerability is due to improper handling of ESI response packets. A remote attacker could exploit this vulnerability by sending crafted ESI response data to the target system potentially leading to arbitrary code execution or denial of service.

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 Squid Proxy ESI Component Stack 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: Proxy Server Enforcement Violation.
Attack Information: Squid Proxy ESI Component Stack Buffer Overflow