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MiniMagic ruby gem remote code execution
From: "Larry W. Cashdollar" <larry0 () me com>
Date: Tue, 12 Mar 2013 23:06:38 +0000 (GMT)
MiniMagic ruby gem remote code execution 3/12/2013 https://github.com/hcatlin/mini_magick A ruby wrapper for ImageMagick or GraphicsMagick command line. Tested on both Ruby 1.9.2 and Ruby 1.8.7. If a URL is from an untrusted source, commands can be injected into it for remote code execution with the ; character. image = MiniMagick::Image.open(remoteurl) image.resize "5x5" image.format "gif" image.write "localcopy.gif" ./hcatlin-mini_magick-1.3.1/lib/mini_magick.rb Lines 172 command = "#{MiniMagick.processor} #{command} {args.join(' ')}".strip 173 174 if ::MiniMagick.use_subexec 175 sub = Subexec.run(command, :timeout => MiniMagick.timeout) 176 exit_status = sub.exitstatus 177 output = sub.output178 else 179 output = `{command} 2>&1`
180 exit_status = $?.exitstatus 181 end The .strip will only remove whitespace from the beginning and end of the command. Larry W. Cashdollar @_larry0 http://vapid.dhs.org
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- MiniMagic ruby gem remote code execution Larry W. Cashdollar (Mar 12)