Security Problems with CVS?

[Matthias Stolt]

Hello,
are there any know security problem with CVS (or TCP/IP port number 2401)?

I want to use CVS in the following way: Inside a firewall there are several developer 
who need to 
contact a CVS repository on a server in the internet. We must open the port 2401. Is 
this "dangerous"?

Our network-administrator is very afraid about this issue.

Thanks for comments
  
  Matthias Stolt