Check Point Advisories

UltraVNC VNCLog Buffer Overflow - Ver2 (CVE-2006-1652)

Check Point Reference: CPAI-2014-2449
Date Published: 28 Dec 2014
Severity: High
Last Updated: Sunday 28 December, 2014
Source:
Industry Reference:CVE-2006-1652
Protection Provided by:

Security Gateway
R77, R76, R75
Who is Vulnerable?
Vulnerability Description UltraVNC is an open source client/server remote control application which uses the Virtual Network Computing (VNC) protocol. The VNC protocol allows a user to control a remote host by sending mouse and keyboard events, and receiving screen and sound updates. UltraVNC offers several extra features and control options, such as an optimized video driver, multiple monitor support, and so on. There exists a buffer overflow vulnerability in the UltraVNC server. The vulnerability is caused by improper validation of user supplied requests sent to the affected component. In a case of an attack where code injection was unsuccessful, the UltraVNC application will terminate, causing denial of service. In a case of an attack where code injection was successful, the behaviour of the target system is dependent on the nature the injected code. Any code injected into the vulnerable component would run in the security context of the user that launched the UltraVNC server application.

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 R77 / R76 / R75 / R71 / R70

  1. In the IPS tab, click Protections and find the UltraVNC VNCLog Buffer Overflow - Ver2 protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name:  HTTP Protocol Inspection.
Attack Information:  UltraVNC VNCLog Buffer Overflow - Ver2

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