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Ruby on Rails XML Processor YAML Deserialization Scanner

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Ruby on Rails XML Processor YAML Deserialization Scanner



This module attempts to identify Ruby on Rails instances vulnerable to an arbitrary object instantiation flaw in the XML request processor.


  • hdm <x@hdm.io>
  • jjarmoc


Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/scanner/http/rails_xml_yaml_scanner
msf auxiliary(rails_xml_yaml_scanner) > show actions
msf auxiliary(rails_xml_yaml_scanner) > set ACTION < action-name >
msf auxiliary(rails_xml_yaml_scanner) > show options
    ...show and set options...
msf auxiliary(rails_xml_yaml_scanner) > run 

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security