Check Point Advisories

GNOME Vino VNC Server Denial of Service (CVE-2013-5745)

Vulnerability
Protection

Check Point Reference:	CPAI-2013-3556
Date Published:	24 Mar 2014
Severity:	High
Last Updated:	Monday 24 March, 2014
Source:	CVE-2013-5745
Protection Provided by:	Security Gateway R75 and above
Who is Vulnerable?	GNOME Vino 2.26.1, 2.32.1, 3.7.3, and earlier
Vulnerability Description	A denial of service vulnerability exists in GNOME Vino VNC Server. The vulnerability is caused by an infinite loop error in the rfbProcessClientMessage() function in rfbserver.c. The vulnerability is due to improper handling of input which results in a loop with an unreachable exit condition.A remote unauthenticated attacker can exploit this vulnerability by initiating a VNC connection with the vulnerable server.

Protection Overview

This protection will detect and block 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, Protection tab and select the version of your choice.

Security Gateway R70 / R71 / R75 and above

In the IPS tab, click Protections and find the GNOME Vino VNC Server Denial of Service protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name:  Content Protection Violation.
Attack Information:  GNOME Vino VNC Server denial of service