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Date: Tue, 11 Mar 2003 13:23:53 +0100
From: =?unknown-8bit?Q?J=F6rn?= Engel <joern@wohnheim.fh-wedel.de>
To: Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>
Cc: linux-kernel@vger.kernel.org, phoebe-list@redhat.com
Subject: Re: Stack growing and buffer overflows
Message-ID: <20030311122353.GA12274@wohnheim.fh-wedel.de>
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On Tue, 11 March 2003 00:00:12 +0100, Felipe Alfaro Solana wrote:
>  
> on x86, the stack grows downwards (from higher memory addresses to
> lower memory addresses). This makes buffer overflows attacks easy to
> exploit: if a function uses strcpy() instead of strncpy() to copy
> data [...]
>  
> However, what would happen if the stack was implemented to grow
> upwards [...]

Stack overflows by mistake would go unnoticed, bad.
Stakc overflows in order to gain root privileges take only little more
effort, no change.

Nothing gained, something lost.

J?rn

-- 
Geld macht nicht gl?cklich.
Gl?ck macht nicht satt.
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