Moreover the vulnerability seems to be exploitable only by client RFB-3.8 [1] compliant, which means VNC4 (i.e. vnc4-4.1.1+X4.3.0 for linux). VNC3 for Linux and Windows are RFB-3.3. This is because the new protocol version implements a different authentication handshake procedure. In fact attack doesn't work neither patching old clients, neither using them with the metasploit plugin realvnc_41_bypass. That's all folks. embyte [1] Remote Frame Buffer protocol, http://realvnc.com/docs/rfbproto.pdf
