RealVNC versions 4.0 and below will crash if more than 60 connections get opened to the server.
4cbd07d2de61806af50567af1cffc65ae403562ad36a20f536da7a1f9217ff35
It will cause RealVNC server die if there are more than 60 connections.
Tested against RealVNC serveron W2k using the following script:
for i in `seq 1 61`
do
nc <server_ip> 5900
done
This will impact version before 4.0 also.
Thanks
Allan