J-Security Center

Title: TightVNC Listening Viewer Multiple Non-Shared Connections DoS Vulnerability

Severity: MODERATE

Description:

TightVNC is a VNC (Virtual Network Computing) distribution maintained by Constantin Kaplinsky.

A vulnerability has been reported in versions of TightVNC for Windows. It is reportedly possible for maliciouis clients to crash the listening viewer.

The viewer will fail if a client establishes a number of non-shared connections.
This issue exists in versions of TightVNC prior to 1.2.4.

Successful exploitation of this issue will shut down the listening viewer. A restart of the service may be required in order to regain normal functionality.

References:

Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.