Re: CVE-2014-6271: remote code execution through bash (3rd vulnerability)

[Ramon de C Valle <rcvalle () vmware com>]

On Sep 26, 2014, at 5:52 PM, Bryan Drewery <bdrewery () FreeBSD org> wrote:

> On 9/26/2014 9:13 AM, Christos Zoulas wrote:
> > On Sep 26,  1:47pm, john.haxby () oracle com (John Haxby) wrote:
> > -- Subject: Re: [oss-security] Re: CVE-2014-6271: remote code execution throu
> >
> > | It's not so much the known attacks -- redefining ls, unset, command,
> > | typeset, declare, etc -- it's the future parser bugs that we don't yet
> > | know about.
> > | 
> > | A friend of mine said this could be a vulnerability gift that keeps on
> > | giving.
> >
> > I think that at this point the conservative approach is best, so
> > until the bash author figures what the best solution is, the feature
> > is disabled by default for NetBSD. It is not wise to expose bash's
> > parser to the internet and then debug it live while being attacked.
> >
> > christos
>
> FreeBSD has taken a similar approach. We have used Christos' patch and
> disabled the feature by default.
>
> https://svnweb.freebsd.org/changeset/ports/369341
>
> Regards,
> Bryan Drewery
In addition to Florian’s and upstream's patches, VMware has also used Christos’ patch and disabled the feature by 
default on all its virtual appliances across all its product line.

--
Ramon de C Valle
VMware Product Security Engineering

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