This URL should give you a starting point.
If you allow user logins to your majordomo box, I do not believe there
is any patch you can apply to prevent them from being dangerous.
> Do you have a list of the minimum "patches" that should be made to
> 1.94.5? We're running the stock distribution of that version, yet you
> seemed to hint
> that there were necessary security fixes. Did you save that list?
> Thanks again for your great advice, and help on the majordomo-users
> listserv. Your assistance over the years has been invaluable! --Michael