Title: Rgpg Ruby Gem Remote Command Injection Date: 7/31/2013 Advisory Author: Larry W. Cashdollar, @_larry0 CVE: TBD Download: https://rubygems.org/gems/rgpg Description: "A simple Ruby wrapper around gpg command for file encryption. rgpg is a simple API for interacting with the gpg tool. It is specifically designed to avoid altering global keyring state by creating temporary public and secret keyrings on the fly for encryption and decryption." Vulnerability: The following code snippet does not sanitize user supplied input before passing it to the System () function for execution. If this API is used in the context of a rails application remote commands can be injected into the shell if the user supplies shell meta characters like ; and &. in lib/rgpg/gpg_helper.rb: 68 begin 69 outputfile.close 70 result = system("#{commandline} > #{output_file.path} 2>&1") 71 ensure Author: Notified 8/1/2013. Fixed: in 0.2.3. 8/1/2013. Greets to all () DEFCON21