Check Point Advisories

TightVNC Integer Overflow (CVE-2019-15678)

Vulnerability
Protection

Check Point Reference:	CPAI-2019-1750
Date Published:	1 Mar 2020
Severity:	Medium
Last Updated:	Sunday 01 March, 2020
Source:
Industry Reference:	CVE-2019-15678
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	TightVNC 1.3.10
Vulnerability Description	An integer overflow vulnerability exists in TightVNC vncviewer. This vulnerability is due to improper handling of ServerCutText messages. 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

In the IPS tab, click Protections and find the TightVNC Integer Overflow (CVE-2019-15678) 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: Content Protection Violation.
Attack Information: TightVNC Integer Overflow (CVE-2019-15678)