Staying Safe in Times of Cyber Uncertainty
Check Point Advisories

Squid Proxy Heap Buffer Overflow (CVE-2019-12526)

Check Point Reference: CPAI-2019-1888
Date Published: 1 Mar 2020
Severity: Critical
Last Updated: Wednesday 05 January, 2022
Industry Reference:CVE-2019-12526
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? Squid Proxy prior to 4.9
Vulnerability Description A heap buffer overflow vulnerability has been reported in Squid Proxy. Successful exploitation could result in execution of arbitrary code under the security context of the squid process.

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

  1. In the IPS tab, click Protections and find the Squid Proxy Heap Buffer Overflow (CVE-2019-12526) protection using the Search tool and Edit the protection's settings.
  2. 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 Heap Buffer Overflow (CVE-2019-12526)

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