bugtraq - Remote command execution in fastreader ruby gem

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Message-Id: <201303171249.r2HCnuvD017615@sf01web1.securityfocus.com>
Date: Sun, 17 Mar 2013 12:49:56 GMT
From: larry0@...com
To: bugtraq@...urityfocus.com
Subject: Remote command execution in fastreader ruby gem

Ruby gem fastreader-1.0.8 remote code exec

3/6/2013
if the url contains any ; characters code will be executed as the user.

for example if fastreader is fed http://www.g;id;.com id will be executed.

./fastreader-1.0.8/lib/entry_controller.rb

.strip only removes whitespace before and after the URL.

115       # open web browser
116       command = (ENV['FASTREADER_WEB'] || "open") + " {@...rent_entry.url.strip}"
117       `{command}`
Larry W. Cashdollar
@_larry0
http://vapid.dhs.org/advisories/fastreader-1.0.8-remote-exec.html