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Q1What is this vulnerability? (Essence + Consequences)
π‘οΈ **Root Cause**: Missing **Boundary Checks**. π§ **Flaw**: The `ClientConnection::NegotiateProtocolVersion()` function uses user-supplied length values for data copying without validation.β¦
π **Privileges**: **Full System Control**. π΅οΈ **Action**: Remote attackers can execute arbitrary code. π **Data**: Potential access to all system data depending on execution context.β¦
π **Public Exploit**: The provided data lists **no specific PoC code** (pocs array is empty). π **References**: Links to CERT (VU#721460), SecurityFocus (BID 27561), and SourceForge confirm the vulnerability exists.β¦
π **Self-Check**: Verify if you are running **UltraVNC VNCViewer**. π **File Check**: Look for `ClientConnection.cpp` in the installation directory. π‘ **Network**: Monitor for unusual VNC protocol negotiations.β¦