linux-kernel - Re: [patch] remove MNT_NOEXEC check for PROT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 04 Oct 2006 23:36:46 +0400
From:	Stas Sergeev <stsp@...et.ru>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Ulrich Drepper <drepper@...hat.com>,
	Linux kernel <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Hugh Dickins <hugh@...itas.com>, Valdis.Kletnieks@...edu
Subject: Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps

Hi.

Arjan van de Ven wrote:
> and chmod o-x bash ....
> at which point.. game over.
> (and yes you can do in bash pretty much what you can do in perl. heck
> you can prove that.. shell is turning complete ;)
Can I do a syscalls from a bash script?
But in any case, I am not going to suggest any
solution against a script-loader - the mmap change
doesn't prevent that too.
Instead I'd like to evaluate a few ideas about an
ld.so problem. One of which is to _enforce_ the "noexec",
just as you asked for. :)
Please have a look at this patch:
http://uwsg.ucs.indiana.edu/hypermail/linux/kernel/0610.0/1402.html
The primary goal is to make access() to respect the "noexec".

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/