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Check Point Advisories

LibVNC LibVNCServer Use After Free (CVE-2018-6307)

Check Point Reference: CPAI-2018-1307
Date Published: 25 Feb 2020
Severity: High
Last Updated: 25 Feb 2020
Industry Reference:CVE-2018-6307
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? LibVNCServer prior to commit ca2a5ac02fbbadd0a21fabba779c1ea69173d10b
Vulnerability Description A use after free vulnerability exists in LibVNC LibVNCServer. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code 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 R80 / R77 / R75

  1. In the IPS tab, click Protections and find the LibVNC LibVNCServer Use After Free (CVE-2018-6307) 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:  Web Server Enforcement Violation.
Attack Information:  LibVNC LibVNCServer Use After Free (CVE-2018-6307)

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