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From: "İsmail Dönmez" <ismail@donmez.ws>
To: Frank Terbeck <ft@bewatermyfriend.org>
Cc: "Zsh Hackers' List" <zsh-workers@zsh.org>
Subject: Re: zsh seems to be vulnerable to CVE-2014-6271: remote code execution through bash
Date: Wed, 24 Sep 2014 17:55:05 +0300	[thread overview]
Message-ID: <CAJ1KOAiJT7eeQXcV1VbU=9A2GqUStm5TLYxEwCzPvowRVJcYog@mail.gmail.com> (raw)
In-Reply-To: <87fvfhvzl9.fsf@ft.bewatermyfriend.org>

[-- Attachment #1: Type: text/plain, Size: 925 bytes --]

On Wed, Sep 24, 2014 at 5:54 PM, Frank Terbeck <ft@bewatermyfriend.org>
wrote:

> İsmail Dönmez wrote:
> > According to the vulnerability test in
> >
> https://securityblog.redhat.com/2014/09/24/bash-specially-crafted-environment-variables-code-injection-attack/
> >
> > [~]> echo $ZSH_VERSION
> > 5.0.6
> >
> > [~]> env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
> > vulnerable
> > this is a test
> >
> > Looks like zsh is vulnerable too.
>
> Does it?
>
> [snip]
> zsh% x='() { :; }; echo vuln' bash -c 'echo test'
> vuln
> test
> zsh% x='() { :; }; echo vuln' zsh -c 'echo test'
> test
> [snap]
>
> Doesn't look like it to me.
>
> Bash has this weird feature, where you can "export functions". I suspect
> that's what's happening here. Zsh doesn't have this feature. Thankfully
>

Brown paper bag for me not replacing bash with zsh ;) Thanks and sorry for
the noise :)

  reply	other threads:[~2014-09-24 14:55 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-24 14:45 İsmail Dönmez
2014-09-24 14:54 ` Frank Terbeck
2014-09-24 14:55   ` İsmail Dönmez [this message]
2014-09-24 15:01   ` Peter Stephenson
2014-09-24 15:08     ` Frank Terbeck
2014-09-24 15:13     ` Jérémie Roquet
2014-09-24 14:55 ` Jérémie Roquet
2014-09-24 14:59 ` Chet Ramey
2014-09-25 13:11 ` Peter Stephenson
2014-09-26 14:03   ` Oliver Kiddle
2014-09-26 20:08     ` Peter Stephenson
2014-09-29 10:04       ` PATCH: safe numeric import Peter Stephenson
2014-09-29 15:24         ` Bart Schaefer
2014-10-01 14:57         ` [Bulk] " Oliver Kiddle
2014-10-02 16:06         ` Peter Stephenson

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