linux-kernel - Re: {2.6.22.y} CVE-2007-6434

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Message-ID: <20080204213406.GX28947@sequoia.sous-sol.org>
Date:	Mon, 4 Feb 2008 13:34:06 -0800
From:	Chris Wright <chrisw@...s-sol.org>
To:	Oliver Pinter <oliver.pntr@...il.com>
Cc:	stable@...nel.org, linux-kernel@...r.kernel.org,
	"chrisw@...s-sol.org" <chrisw@...s-sol.org>,
	Greg KH <gregkh@...e.de>, Willy Tarreau <w@....eu>,
	Adrian Bunk <bunk@...nel.org>, Nick Piggin <npiggin@...e.de>
Subject: Re: {2.6.22.y} CVE-2007-6434

* Oliver Pinter (oliver.pntr@...il.com) wrote:
> mainline: ecaf18c15aac8bb9bed7b7aa0e382fe252e275d5
> 
> --->8---
> commit ecaf18c15aac8bb9bed7b7aa0e382fe252e275d5
> Author: Eric Paris <eparis@...hat.com>
> Date:   Tue Dec 4 23:45:31 2007 -0800
> 
>     VM/Security: add security hook to do_brk
> 
>     Given a specifically crafted binary do_brk() can be used to get low pages
>     available in userspace virtual memory and can thus be used to circumvent
>     the mmap_min_addr low memory protection.  Add security checks in do_brk().

All of the low mmap addr stuff isn't added until 2.6.23.

thanks,
-chris
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