Is 4.03/4.1 yppasswd secure?

[sid at]

We turned the yppasswd service off some time ago because it had some
problems with security holes. The 4.03 changes list contains an entry to
the effect that a security hole was fixed in yppasswd. Does anyone know of
any unfixed security problems in the 4.03 or 4.1 versions of yppasswd? In
other words, is it safe to use?

Sid Stuart, Thinking Machines Corp.
sid at think.com
{uunet,harvard}!think!sid