From: Chet Ramey <chet.ramey@case.edu>
To: Boyan Penkov <boyan.penkov@gmail.com>, zsh-workers@zsh.org
Cc: chet.ramey@case.edu, Adrian Bradd <ab4042@columbia.edu>
Subject: Re: Shellshock in zsh
Date: Thu, 25 Sep 2014 09:56:27 -0400 [thread overview]
Message-ID: <54241F0B.8080400@case.edu> (raw)
In-Reply-To: <9D3C0670-6D81-4DE9-8E34-49D5835C3EA8@gmail.com>
On 9/25/14, 9:29 AM, Boyan Penkov wrote:
> Hey folks,
>
> I’m writing to ask about zsh and Shellshock. Since bash is affected, is zsh affected as well? Two of us took a look, and we think it may be.
>
> Specifically, following these steps — https://access.redhat.com/articles/1200223 — in zsh 5.0.6 on OS 10.9.5 and zsh 5.0.2 on OS 10.9.4 yields the “vulnerable” output.
zsh is not vulnerable; it does not use the environment to export functions.
The example
env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
^^^^
||||
runs bash with the specially-crafted variable in the environment regardless
of the shell you use to execute that command line.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
prev parent reply other threads:[~2014-09-25 13:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-25 13:29 Boyan Penkov
2014-09-25 13:35 ` Peter Stephenson
2014-09-25 13:56 ` Chet Ramey [this message]
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