Check Point Advisories

Squid Proxy Denial of Service (CVE-2018-1172; CVE-2018-1000027)

Vulnerability
Protection

Check Point Reference:	CPAI-2018-0513
Date Published:	27 May 2018
Severity:	High
Last Updated:	Monday 28 November, 2022
Source:
Industry Reference:	CVE-2018-1000027 CVE-2018-1172
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Squid 3.1.12.2 to 3.1.23 Squid 3.2.0.8 to 3.2.14 Squid 3.3 to 3.5.27 Squid 4.x to 4.0.12
Vulnerability Description	A denial of service vulnerability exists in Squid Proxy. Successful exploitation of this vulnerability would allow remote attackers to cause denial of service on the affected system.

Protection Overview

This protection detects 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 R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the Squid Proxy Denial of Service (CVE-2018-1172) 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: OpenSSL Enforcement Violation.
Attack Information: Squid Proxy Denial of Service (CVE-2018-1172)