"John Blumel" <[EMAIL PROTECTED]> wrote:
> I've played with this and it seems to work ok. How would you evaluate
> this as a security risk?

  It's not a serious risk, in my opinion.

  The only thing I would do is to limit where people can telnet from.
You should allow telnets from your dial-up pool, and not much else.
If you used ssh instead of telnet, that would be even better.

> Theoretically, the worst case is that someone changes the password
> that they've stolen and I have to reset it but how much should I
> worry about buffer overflow or other attacks with passwd or
> replacements as the shell?

  If 'passwd' has a buffer overflow, then people with shell accounts
will be able to become root.   I wouldn't worry too much.  'passwd' is
one of the most closely examined programs for security risks.

  Alan DeKok.

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