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vulnerability bulletin 8903

VNC: privilege elevation

Synthesis of the vulnerability

A local attacker can elevate his privileges via a vulnerability of VNC Server Service-Mode.
Impacted systems: RealVNC.
Severity of this alert: 2/4.
Consequences of an intrusion: privileged access/rights.
Pirate's origin: user shell.
Creation date: 30/07/2009.
Références of this alert: VIGILANCE-VUL-8903.

Description of the vulnerability

The VNC Enterprise Edition and VNC Personal Edition products can be started in:
 - User-Mode : direct execution
 - Service-Mode : execution as a Windows/Unix service

When Service-Mode is used, an attacker with access to the console of the host system can elevate his privileges.

 This vulnerability may be used by a local attacker to use the service in order to become administrator.
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