From: Pavel Machek <pavel@ucw.cz>
To: Andreas Steinmetz <ast@domdv.de>
Cc: "H. J. Lu" <hjl@lucon.org>, linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: How to make stack executable on demand?
Date: Mon, 19 Apr 2004 16:39:58 +0200 [thread overview]
Message-ID: <20040419143957.GA831@openzaurus.ucw.cz> (raw)
In-Reply-To: <408020E2.9060900@domdv.de>
Hi!
> >is set with executable stack. Is there a third option that a process
> >starts with non-executable stack and can change the stack permission
> >later?
> >
>
> Well, in my opinion your request is equivalent to "keep all these
> cute buffer overflows forever". Take any protected app, LD_PRELOAD or
> drop in a bad/malicious library and your're done for good. Not really
> a good idea.
With malicious libraries, you have *way* bigger problems than
buffer overruns.
Pavel
--
64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms
next prev parent reply other threads:[~2004-04-22 19:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-16 17:09 How to make stack executable on demand? H. J. Lu
2004-04-16 18:07 ` Andreas Steinmetz
2004-04-16 19:40 ` H. J. Lu
2004-04-19 14:39 ` Pavel Machek [this message]
2004-04-16 20:02 ` Arjan van de Ven
2004-04-16 20:46 ` H. J. Lu
2004-04-16 20:57 ` Dave Jones
2004-04-17 7:13 ` Arjan van de Ven
2004-04-19 0:08 ` Jamie Lokier
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