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Message-id: <2722ED66-88FE-480B-8ACC-CC402F5C40DE@me.com> Date: Mon, 02 Dec 2013 18:51:35 -0500 From: "Larry W. Cashdollar" <larry0@...com> To: full <full-disclosure@...ts.grok.org.uk> Subject: Command injection vulnerability in Ruby Gem sprout 0.7.246 Title: Command injection vulnerability in Ruby Gem sprout 0.7.246 Download: http://rubygems.org/gems/sprout, http://projectsprouts.org/ Vulnerability: The unpack_zip() function contains the following code: sprout-0.7.246/lib/sprout/archive_unpacker.rb 60 zip_dir = File.expand_path(File.dirname(zip_file)) 61 zip_name = File.basename(zip_file) 62 output = File.expand_path(dir) 63 # puts ">> zip_dir: #{zip_dir} zip_name: #{zip_name} output: #{output} " 64 %x(cd #{zip_dir};unzip #{zip_name} -d #{output}) If the attacker can control zip_dir, zip_name or output then they can possibly execute shell commands by injecting shell meta characters as input. PoC: For example: filename;id;.zip I contacted the developer a few weeks ago but received no response. Thanks! Larry W. Cashdollar @_larry0 _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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