Class: Kekkan::Parsers::Cve2Document

Inherits:
Nokogiri::XML::SAX::Document
  • Object
show all
Defined in:
lib/kekkan/parsers/cve_2_sax_listener.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cve2Document

Sets up a array of all valid XML fields



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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 28

def initialize
  @vals = Hash.new

  @valid_elements = Array[
    "nvd", "vuln:cve-id", "vuln:published-datetime", "vuln:last-modified-datetime",
    "cvss:score", "cvss:access-vector", "cvss:access-complexity", "cvss:authentication",
    "cvss:confidentiality-impact", "cvss:integrity-impact", "cvss:availability-impact",
    "cvss:source", "cvss:generated-on-datetime", "cvss:base_metrics", "vuln:cvss",
    "vuln:summary", "vuln:reference", " vuln:source", "vuln:references", "vuln:source",
    "entry", "vuln:vulnerable-software-list", "vuln:product", "vuln:cwe",
    "vuln:security-protection", "vuln:assessment_check", "vuln:definition",
    "vuln:scanner"
  ]

  @ignored_elements = Array[
    "cpe-lang:logical-test", "vuln:vulnerable-configuration", "cpe-lang:fact-ref"
  ]

  @valid_elements = @valid_elements + @ignored_elements

end

Instance Method Details

#characters(text) ⇒ Object

Called when the inner text of a element is reached



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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 112

def characters(text)
  if @vals[@tag] == nil then
    @vals[@tag] = text.strip
  else
    @vals[@tag] << text.strip
  end
end

#end_element(element) ⇒ Object

Called when the end of the XML element is reached



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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 123

def end_element(element)
  #puts "End element: #{element}"
  @tag = nil
  case element
    when "vuln:cve-id"
      @entry.attributes = { :cve => @vals["vuln:cve-id"] }
      @entry.save

    when "vuln:published-datetime"
      @entry.attributes = { :published_datetime => @vals["vuln:published-datetime"]  }
      @entry.save

    when "vuln:last-modified-datetime"
      @entry.attributes = { :last_modified_datetime => @vals["vuln:last-modified-datetime"]  }
      @entry.save

    when "vuln:summary"
      @entry.attributes = { :summary => @vals["vuln:summary"] }
      @entry.save

    when "vuln:security-protection"
      @entry.attributes = { :security_protection => @vals["vuln:security-protection"]}
      @entry.save

    when "vuln:product"
      @product = @entry.vulnerable_software_lists.create
      @product.attributes = { :product => @vals["vuln:product"] }
      @product.save

    when "vuln:cvss"
      @cvss.attributes = {
        :score => @vals["cvss:score"],
        :access_vector => @vals["cvss:access-vector"],
        :access_complexity  => @vals["cvss:access-complexity"],
        :authenication  => @vals["cvss:authentication"],
        :confidentiality_impact  => @vals["cvss:confidentiality-impact"],
        :integrity_impact  => @vals["cvss:integrity-impact"],
        :availability_impact  => @vals["cvss:availability-impact"],
        :source  => @vals["cvss:source"],
        :generated_on_datetime  => @vals["cvss:generated-on-datetime"]
      }
      @cvss.save

    when "vuln:references"
      @reference.attributes = {
        :source => @vals["vuln:source"],
        :reference => @vals["vuln:reference"]
      }
      @reference.save
  end
end

#start_element(element, attributes = []) ⇒ Object

Callback for when the start of a XML element is reached



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# File 'lib/kekkan/parsers/cve_2_sax_listener.rb', line 54

def start_element(element, attributes = [])
  @tag = element
  @vals[@tag] = ""

  if !@valid_elements.include?(element)
    puts "New XML element detected: #{element}. Please report this to #{Kekkan::EMAIL}"
  end

  case element
    when "entry"
      @entry = Kekkan::Models::Entry.create
      @entry.save

    when "vuln:cvss"
      @cvss = @entry.cvsses.create
      @cvss.save

    when "vuln:cwe"
      @entry.attributes = { :cwe => Hash[attributes]["id"] }
      @entry.save

    when "vuln:references"
      @reference = @entry.references.create
      @reference.attributes = {
        :ref_type => Hash[attributes]["reference_type"]
      }
      @reference.save

    when "vuln:reference"
      @reference.attributes = {
        :href => Hash[attributes]["href"],
        :language => Hash[attributes]["xml:lang"]
      }
      @reference.save

    when "vuln:assessment_check "
      @ass = @entry.assessment_check.create
      @ass.attributes = {
        :name => Hash[attributes]["name"],
        :href => Hash[attributes]["href"],
        :system => Hash[attributes]["system"]
      }
      @entry.save

    when "vuln:definition"
      @scanner = @entry.scanners.create
      @scanner.attributes = {
        :name => Hash[attributes]["name"],
        :href => Hash[attributes]["href"],
        :system => Hash[attributes]["system"]
      }
      @scanner.save
  end
end