Check Point Advisories

LibVNCServer rfbProcessClientNormalMessage msg.ssc.scale Divide by Zero Denial of Service (CVE-2014-6054)

Check Point Reference: CPAI-2014-1903
Date Published: 29 Oct 2014
Severity: High
Last Updated: Wednesday 29 October, 2014
Source: LibVNCServer 05a9bd41a
Industry Reference:CVE-2014-6054
Protection Provided by:

Security Gateway
R77

  • R76
  • R75

    		•
    Who is Vulnerable? LibVNCServer Development Team LibVNCServer 0.9.9 and prior
    Vulnerability Description A denial of service vulnerability exists in LibVNCserver. The vulnerability is due to a division by zero when processing an rfbSetScale message. A remote authenticated attacker can exploit this vulnerability by sending a specially crafted RFB message to the server.

    Protection Overview

    Security Gateway R77 / R76 / R75 / R71 / R70

    1. In the IPS tab, click Protections and find the LibVNCServer rfbProcessClientNormalMessage msg.ssc.scale Divide by Zero Denial of Service 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:  Web Server Enforcement Violation.
    Attack Information:  LibVNCServer rfbProcessClientNormalMessage msg.ssc.scale Divide by Zero Denial of Service

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