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Ruby gem Thumbshooter 0.1.5 remote command execution
From: "Larry W. Cashdollar" <larry0 () me com>
Date: Tue, 26 Mar 2013 15:13:23 +0000 (GMT)

´╗┐Ruby gem Thumbshooter 0.1.5 remote command execution´╗┐

Generates thumbshots of URLs by using Webkit and QT4.


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
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