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Date: Sun, 01 Sep 2013 13:44:31 -0400
From: Larry Cashdollar <larry0@...com>
To: cve-assign@...re.org
Cc: oss-security@...ts.openwall.com
Subject: Re: Remote Command Injection in fog-dragonfly-0.8.2 Ruby Gem
Yes sorry this is for the gem only.
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On September 1, 2013 12:25:17 PM cve-assign@...re.org wrote:
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> Hash: SHA1
>
> >Remote Command Injection in fog-dragonfly-0.8.2 Ruby Gem
> >Download: https://rubygems.org/gems/fog-dragonfly
> >
> >"Dragonfly is an on-the-fly Rack-based image handling framework. It is
> >suitable for use with Rails, Sinatra and other web frameworks.
> >
> >Unescaped user supplied input is passed to the command line for shell
> >execution
> >
> >fog-dragonfly-0.8.2/lib/dragonfly/imagemagickutils.rb:
> >
> > 20 def convert(tempobject, args='', format=nil)
> > 21 tempfile = newtempfile(format)
> > 22 run "#{convertcommand} #{args} #{tempobject.path} #{tempfile.path}"
> > 23 tempfile
> > 24 end
> >
> >
> > 61 def run(command)
> > 62 log.debug("Running command: #{command}") if
> ImageMagickUtils.log_commands
> > 63 begin
> > 64 result = #{command}
>
> Use CVE-2013-5671 for this vulnerability in the fog-dragonfly gem. As
> far as we can tell, this is a vulnerability in the fog-dragonfly gem,
> not a vulnerability in Dragonfly. We found these possibly related
> fixes in Dragonfly:
>
> https://github.com/markevans/dragonfly/commit/ff141bb1d921fff506084b62a562f7a83d5e01fe#lib/dragonfly/image_magick/utils.rb
>
> https://github.com/markevans/dragonfly/commit/47f95bd6b8af11fb0a44d6ab1c6f7d00d880cb68
>
> If the unpatched Dragonfly code has a vulnerability in a common use
> case, this would require a separate CVE ID.
>
> - -- CVE assignment team, MITRE CVE Numbering Authority
> M/S M300
> 202 Burlington Road, Bedford, MA 01730 USA
> [ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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