what you don't know can hurt you

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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