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Vulnerability Development: Re: ssh-1.2.27 remote buffer overflow - exploitable

Re: ssh-1.2.27 remote buffer overflow - exploitable

From: Daniel Jacobowitz <drow_at_FALSE.ORG>
Date: Tue, 9 Nov 1999 11:04:19 -0500

On Tue, Nov 09, 1999 at 01:48:53AM -0000, Frank wrote:
> This is submitted to the Freebsd bug tracking system, although there
> are doubtless other vendors who leave this package, despite the
> existence of the ssh-2.X. While Debian appears to be immune, I was
> able to crash my ssh daemon (much to my dismay), and there appears
> the potential to execute arbitrary code, as long as you encrypt it
> first...

Debian is immune for the (somewhat messy) reasons that they do not link
ssh to rsaref, last time that I checked.

> Here is the freebsd report.. it describes the method to crash a
> remote Ssh daemon (lets hope you ran sshd from your xinetd, etc).
>
> http://www.freebsd.org/cgi/query-pr.cgi?pr=14749

Yep, I see the problem. I'm trying to figure out enough of the
internals of this to patch it right now.

Dan

/--------------------------------\ /--------------------------------\
| Daniel Jacobowitz |__| SCS Class of 2002 |
| Debian GNU/Linux Developer __ Carnegie Mellon University |
| dan_at_debian.org | | dmj+@andrew.cmu.edu |
\--------------------------------/ \--------------------------------/
Received on Nov 09 1999

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