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Date:      Thu, 27 Mar 1997 08:05:35 -0700
From:      Warner Losh <imp@village.org>
To:        proff@suburbia.net
Cc:        security@freebsd.org
Subject:   Re: FreeBSD-SA-97:02: Buffer overflow in lpd 
Message-ID:  <E0wAGkB-00072F-00@rover.village.org>
In-Reply-To: Your message of "Thu, 27 Mar 1997 09:48:29 %2B1100." <19970326224830.6053.qmail@suburbia.net> 
References:  <19970326224830.6053.qmail@suburbia.net>  

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In message <19970326224830.6053.qmail@suburbia.net> proff@suburbia.net writes:
: Writing exploit code using only alpha-numeric characters, "." and "-" might
: be an interesting challenge.

There have been reports in various lists that have exactly this kind
of code, or at least pointers to this kind of code.  Writing the egg
for the buffer overflow is the hard part of this, but it has been
done, at least for intel machines.  Kinda scary.

Then again, if you have the old ms-kermit program, look at boot.com.
All printable characters and it does very useful things.  While
printable characters are a superset of a-zA-Z.-, there is no reason
why you couldn't do it....

Warner



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