Check Point Advisories

UltraVNC VNC Server Stack-based Buffer Overflow (CVE-2019-8276)

Check Point Reference: CPAI-2019-1522
Date Published: 31 Dec 2019
Severity: High
Last Updated: Thursday 26 October, 2023
Industry Reference:CVE-2019-8276
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? UVNC UltraVNC prior to
Vulnerability Description A buffer overflow vulnerability exists in UltraVNC VNC. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system or cause application crashes.

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 UltraVNC VNC Server Stack-based Buffer Overflow (CVE-2019-8276) 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:  Content Protection Violation.
Attack Information:  UltraVNC VNC Server Stack-based Buffer Overflow (CVE-2019-8276)

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