Class: NTOSpider::Vuln

Inherits:
Object
  • Object
show all
Defined in:
lib/ntospider/vuln.rb

Overview

This class represents each of the vulnerabilities reported in the NTOSpider VulnerabilitiesSummary.xml file as <Vuln> entities.

It provides a convenient way to access the information scattered all over the XML entities.

Instead of providing separate methods for each supported property we rely on Ruby’s #method_missing to do most of the work.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(xml_node) ⇒ Vuln

Accepts an XML node from Nokogiri::XML.



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# File 'lib/ntospider/vuln.rb', line 13

def initialize(xml_node)
  @xml = xml_node
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object

This method is invoked by Ruby when a method that is not defined in this instance is called.

In our case we inspect the @method@ parameter and try to find the attribute, simple descendent or collection that it maps to in the XML tree.



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# File 'lib/ntospider/vuln.rb', line 51

def method_missing(method, *args)
  # We could remove this check and return nil for any non-recognized tag.
  # The problem would be that it would make tricky to debug problems with
  # typos. For instance: <>.potr would return nil instead of raising an
  # exception
  unless supported_tags.include?(method)
    super
    return
  end

  # First we try the attributes. In Ruby we use snake_case, but in XML
  # CamelCase is used for some attributes
  translations_table = {
    capec: 'CAPEC',
    dissa_asc: 'DISSA_ASC',
    imperva_bl: 'DefenseBL/Imperva',
    imperva_wl: 'DefenseWL/Imperva',
    mod_security_bl: 'DefenseBL/ModSecurity',
    mod_security_wl: 'DefenseWL/ModSecurity',
    oval: 'OVAL',
    owasp2007: 'OWASP2007',
    owasp2010: 'OWASP2010',
    owasp2013: 'OWASP2013',
    owasp2017: 'OWASP2017',
    pcre_regex_bl: 'DefenseBL/PcreRegex',
    pcre_regex_wl: 'DefenseWL/PcreRegex',
    snort_bl: 'DefenseBL/Snort',
    snort_wl: 'DefenseWL/Snort',
    wasc: 'WASC',
    web_site_ip: 'WebSiteIP'
  }

  method_name = translations_table.fetch(method, method.to_s.camelcase)

  # no attributes in the <Vuln> node
  # return @xml.attributes[method_name].value if @xml.attributes.key?(method_name)

  # Then we try simple children tags: name, type, ...
  tag = @xml.at_xpath("./#{method_name}")
  if tag && !tag.text.blank?
    if tags_with_html_content.include?(method)
      return cleanup_html(tag.text)
    else
      return tag.text
    end
  else
    # nothing found, the tag is valid but not present in this Vuln
    return nil
  end
end

Instance Attribute Details

#xml ⇒ Object

Returns the value of attribute xml.



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# File 'lib/ntospider/vuln.rb', line 11

def xml
  @xml
end

Instance Method Details

#respond_to?(method, include_private = false) ⇒ Boolean

This allows external callers (and specs) to check for implemented properties

Returns:

  • (Boolean) 


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# File 'lib/ntospider/vuln.rb', line 40

def respond_to?(method, include_private=false)
  return true if supported_tags.include?(method.to_sym)
  super
end

#supported_tags ⇒ Object

List of supported tags. They can be attributes, simple descendants or collections (e.g. <references/>, <tags/>)



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# File 'lib/ntospider/vuln.rb', line 19

def supported_tags
  [
    # attributes

    # simple tags
    :attack_class, :attack_score, :attack_type, :attack_value, :capec,
    :confidence, :cwe_id, :description, :dissa_asc, :html_entity_attacked,
    :normalized_url, :oval, :owasp2007, :owasp2010, :owasp2013, :owasp2017,
    :page, :recommendation, :scan_date,
    :statistically_prevalent_original_response_code, :url, :vuln_method,
    :vuln_param, :vuln_param_type, :vuln_type, :vuln_url, :wasc, :web_site,
    :web_site_ip,

    # nested tags
    :imperva_bl, :imperva_wl, :mod_security_bl, :mod_security_wl,
    :pcre_regex_bl, :pcre_regex_wl, :snort_bl, :snort_wl
  ]
end