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Ruby Gem Fastreader 1.0.8 Command Execution

Ruby Gem Fastreader 1.0.8 Command Execution
Posted Mar 13, 2013
Authored by Larry W. Cashdollar

Ruby Gem Fastreader version 1.0.8 suffers from a remote command execution vulnerability due to a lack of user input sanitization.

tags | exploit, remote, code execution, ruby
MD5 | 38729ad241ac5c64fde17ae6de9e1a3d

Ruby Gem Fastreader 1.0.8 Command Execution

Change Mirror Download
Ruby gem fastreader-1.0.8 remote code exec
3/6/2013


https://rubygems.org/gems/fastreader

if the url contains any ; characters code will be executed as the user when a web browser is launched.

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") + " {@current_entry.url.strip}"
117 `{command}`

Larry W. Cashdollar
@_larry0
http://vapid.dhs.org

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