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Message-ID: <20140926210907.GA31108@openwall.com>
Date: Sat, 27 Sep 2014 01:09:07 +0400
From: Solar Designer <solar@...nwall.com>
To: oss-security@...ts.openwall.com
Cc: chet.ramey@...e.edu
Subject: Re: CVE-2014-6271: remote code execution through bash
Chet,
On Thu, Sep 25, 2014 at 09:07:07PM -0400, Chet Ramey wrote:
> On 9/24/14, 9:30 PM, Solar Designer wrote:
> > On Wed, Sep 24, 2014 at 06:26:53PM -0700, Anthony Liguori wrote:
> >> On Wed, Sep 24, 2014 at 6:23 PM, Chet Ramey <chet.ramey@...e.edu> wrote:
> >>> On 9/24/14, 5:32 PM, Solar Designer wrote:
> >>>> On Wed, Sep 24, 2014 at 11:27:09PM +0200, Hanno B??ck wrote:
> >>>>> Tavis Ormandy just tweetet this:
> >>>>> https://twitter.com/taviso/status/514887394294652929
> >>>>>
> >>>>> The bash patch seems incomplete to me, function parsing is still
> >>>>> brittle. e.g. $ env X='() { (a)=>\' sh -c "echo date"; cat echo
> >>>>
> >>>> Thanks for bringing this to oss-security. I've added CC to Chet and
> >>>> Tavis on this "reply".
> >>>
> >>> I have a fix for this.
> >>
> >> Can you provide a pointer to the patch? I put together a patch that
> >> changed the report_error() to fatal_error() as I wasn't able to see
> >> how to reset the parser state. Was just about to send it out...
>
> I have positive confirmation that this patch works, so here are patches for
> bash versions bash-2.05b to bash-4.3.
>
> I will probably push these out tomorrow.
Since these patches look final and are updating the bash patchlevel
number, is it OK for distros to use them as-is, with the patchlevel
number update already?
They are not yet on ftp.gnu.org. BTW, I notice that your earlier
bash 2.05b patch isn't there, either.
And while I am at it - thank you for providing detached signatures for
bash patches! This is something the VIM project fails at, whereas you
do it right. Appreciated!
Alexander
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