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Date: Wed, 24 Sep 2014 23:01:34 -0400
From: Chet Ramey <chet.ramey@...e.edu>
To: Solar Designer <solar@...nwall.com>, oss-security@...ts.openwall.com
CC: chet.ramey@...e.edu
Subject: Re: CVE-2014-6271: remote code execution through bash
On 9/24/14, 9:30 PM, Solar Designer wrote:
>>>>> 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 think Chet is not on oss-security - we should be CC'ing him where
> appropriate. (I've added the CC on this reply.)
Here's the patch. It's not specific to this vulnerability -- I can get
it to work from at least one other code path. Please take a look and
see if you can bypass it.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@...e.edu http://cnswww.cns.cwru.edu/~chet/
View attachment "eol-pushback.patch" of type "text/x-patch" (312 bytes)
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