full-disclosure - Re: Re: Re: open telnet port

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From: gem at rellim.com (Gary E. Miller)
Subject: Re: Re: Re: open telnet port

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Yo Andrew!

On Fri, 10 Sep 2004, Andrew Farmer wrote:

> Still don't know why you'd use these instead of ssh/sftp, though.

As noted here earlier, if you update OpenSSL you stand a good chance
of dropping ALL your ssh conections until you install a matching
ssh update.  Most sshd will not start if the openssl libs on the
disk are not the same exact version it was compiled with.

When I am updateing hosts hundreds or thousands of miles away in
an unattended facility I can not take chances on a fatal mistake
during an update.  A backdoor telnet has saved my butt many times.

Also seen cases where a trojaned sshd was installed on the target
machine, but it would not run due to configuration issues.  Having
a backdoor telnet means the system is back up in 5 minutes of
remote twiddling instead of dispatching someone to a remote co-lo.

Gotta keep the single points of failure to a minimum.

RGDS
GARY
- ---------------------------------------------------------------------------
Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701
	gem@...lim.com  Tel:+1(541)382-8588 Fax: +1(541)382-8676

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