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Date: Mon, 01 Apr 2013 15:32:03 +0000 (GMT)
From: "Larry W. Cashdollar" <larry0@...com>
To: full <full-disclosure@...ts.grok.org.uk>
Subject: Remote command execution in Ruby Gem ldoce 0.0.2
Remote command execution in Ruby Gem ldoce 0.0.2
Larry W. Cashdollar
@_larry0
3/25/2013
Ldoce Ruby Gem:
Easily interface with the Longman Dictionary of Contemporary English API from Ruby:
NB currently mac only as it depends on the afplay command.
https://rubygems.org/gems/ldoce
https://github.com/markburns/ldoce
Ldoce passes an mp3 url to commandline for audio output of the pronunciation of a dictonary word:
If the URL or filename for the mp3 files contain shell metacharacters code can be executed remotely as the client:
[./ldoce-0.0.2/lib/ldoce/word.rb]
if mp3?
unless File.exists? filename
command = "curl #{mp3_url} -silent > {filename}"
`{command}`
end
`afplay #{filename}`
end
This vulnerability has been assigned CVE-ID CVE-2013-1911
http://otiose.dhs.org/advisories/ldoce-0.0.2-cmd-exec.html
Content of type "text/html" skipped
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