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Message-ID: <20090720112909.GA18723@openwall.com>
Date: Mon, 20 Jul 2009 15:29:09 +0400
From: Solar Designer <solar@...nwall.com>
To: oss-security@...ts.openwall.com
Subject: Re: Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable
Marcus,
On Mon, Jul 20, 2009 at 12:01:47PM +0200, Marcus Meissner wrote:
> - fixed the personality - PER_CLEAR_ON_SETTID inheritance issue (CVE-2009-1895)
> to work around mmap_min_addr protection.
> Affects 2.6.23-2.6.30.1
What makes you think this does not affect earlier kernels? This does
not match my analysis, but maybe I am missing something, hence I ask.
BTW, as you're aware, this fix is a hardening measure for/against
SUID-root programs with a certain class of design errors in them; it is
not exactly a fix for the kernel itself, although it should be in the
kernel. I do not mean to downplay the issue, but I think it is
important that we distinguish the different types of changes that we are
making in response to Brad's exploit.
Alexander
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