[SA13143] RealVNC Multiple Connections Denial of Service Vulnerability

Type securityvulns
Reporter Securityvulns
Modified 2004-11-11T00:00:00


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TITLE: RealVNC Multiple Connections Denial of Service Vulnerability


VERIFY ADVISORY: http://secunia.com/advisories/13143/

CRITICAL: Less critical


WHERE: >From remote

SOFTWARE: RealVNC 4.x http://secunia.com/product/3719/

DESCRIPTION: A vulnerability has been discovered in RealVNC, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the connection handling and can be exploited by establishing around 100 connections to port 5800/tcp or port 5900/tcp.

Successful exploitation prevents further connections from being established.

The vulnerability has been confirmed in version 4.0 for Windows. Other versions may also be affected.

SOLUTION: Restrict access to the services.

PROVIDED AND/OR DISCOVERED BY: Originally discovered by: Allan Zhang

Reported to also affect port 5800/tcp by: Dr_insane

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