oss-sec mailing list archives
Ruby gem Thumbshooter 0.1.5 remote code execution
From: larry Cashdollar <larry0 () me com>
Date: Tue, 26 Mar 2013 07:23:03 -0400
Ruby gem Thumbshooter 0.1.5 remote code execution 3/25/2013 Generates thumbshots of URLs by using Webkit and QT4. https://github.com/digineo/thumbshooter Specially crafted URLs can result in remote code execution if the URL contains shell metacharacters. We see that the url is passed directly to the shell in the following code snippet from ./thumbshooter-0.1.5/lib/thumbshooter.rb lines: 1012 command << "xvfb-run -a --server-args='-screen 0, #{screen}x24' " 1015 command << "{WEBKIT2PNG} '{url}' {args}" 1017 img = `{command} 2>&1` Larry W. Cashdollar @_larry0 http://vapid.dhs.org/advisories/thumbshooter-ruby-gem-remoteexec.html Larry C$
Current thread:
- Ruby gem Thumbshooter 0.1.5 remote code execution larry Cashdollar (Mar 26)
- Re: Ruby gem Thumbshooter 0.1.5 remote code execution Larry W. Cashdollar (Mar 26)
- Re: Ruby gem Thumbshooter 0.1.5 remote code execution Kurt Seifried (Mar 26)
- Re: Ruby gem Thumbshooter 0.1.5 remote code execution Larry W. Cashdollar (Mar 26)