WinVNC may allow remote attacker to modify registry information to permit unauthorized access

winvnc-modify-registry (5545) The risk level is classified as HighHigh Risk


WinVNC could allow a remote attacker to gain unauthorized access to the service. In the default installation, the HKEY_LOCAL_MACHINES\Software\ORL\WinVNC3\ registry key is created containing the connection password and IP restrictions. Privileges on the registry key give ful access to the Administrator and SYSTEM accounts, while the Everybody group has read and modify privileges. A remote attacker can edit the registry and delete the password value and set the "AuthRequired" key to 0 to gain complete access to the system.


Gain Access


No remedy available as of September 1, 2014.


Platforms Affected:

  • AT&T WinVNC 3.3.3 and prior


Nov 19, 2000

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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