[3237] in bugtraq
Re: libresolv+ bug
daemon@ATHENA.MIT.EDU (Julian Assange)
Wed Aug 21 13:52:07 1996
Date: Wed, 21 Aug 1996 20:27:30 +1000
Reply-To: Bugtraq List <BUGTRAQ@netspace.org>
From: Julian Assange <proff@suburbia.net>
X-To: tqbf@enteract.com
To: Multiple recipients of list BUGTRAQ <BUGTRAQ@netspace.org>
In-Reply-To: <199608210055.TAA18125@enteract.com> from "Thomas Ptacek" at Aug
20, 96 07:55:29 pm
> But, as we all know, that's not a particularly effective solution to the
> problem. The real problems, as I'm sure you'll agree, der Mouse, are that
> SUID programs aren't being written carefully enough, library routines that
> are potentially depended on by SUID programs aren't written with those
> security issues in mind, and, in general, most Unix OS's give
> "priveledged" programs that need to do one or two specific things far, far
> too much power.
From what I have seen, stack exploits are considerably harder on Alpha
architecture as the mmu does not grant the stack exec permissions, and the
data space grows upwards, meaning that any over-written return address
must contain a NULL if you the trojan code there. Calling code in the
text segment, is still possible, if almost always futile.
--
"Of all tyrannies a tyranny sincerely exercised for the good of its victims
may be the most oppressive. It may be better to live under robber barons
than under omnipotent moral busybodies, The robber baron's cruelty may
sometimes sleep, his cupidity may at some point be satiated; but those who
torment us for own good will torment us without end, for they do so with
the approval of their own conscience." - C.S. Lewis, _God in the Dock_
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