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Ruby Gem Fastreader 1.0.8 Code Execution

Ruby Gem Fastreader 1.0.8 Code Execution
Posted Mar 18, 2013
Authored by Larry W. Cashdollar

Ruby Gem Fastreader version 1.0.8 suffers from a remote code execution vulnerability.

tags | exploit, remote, code execution, ruby
SHA-256 | 89b87fccb71d43cbfd06695564eb38fc2b65d8c3efba57236545d8452c11b607

Ruby Gem Fastreader 1.0.8 Code Execution

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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") + " {@current_entry.url.strip}"
117 `{command}`
Larry W. Cashdollar
@_larry0
http://vapid.dhs.org/advisories/fastreader-1.0.8-remote-exec.html
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