class Rex::Parser::OpenVASDocument

Public Instance Methods

end_element(name=nil) click to toggle source

When we exit a tag, this is triggered.

# File lib/rex/parser/openvas_nokogiri.rb, line 24
def end_element(name=nil)
  block = @block
  case name
  when "name"
    return if not in_tag("result")
    @state[:has_text] = true
    @state[:vuln_name] = @text.strip if @text
    @text = nil
  when "description"
    @state[:has_text] = true
    @state[:vuln_desc] = @text.strip if @text
    @text = nil
  when "bid"
    return if not in_tag("result")
    return if not in_tag("nvt")
    @state[:has_text] = true
    @state[:bid] = @text.strip if @text
    @text = nil
  when "cve"
    return if not in_tag("result")
    return if not in_tag("nvt")
    @state[:has_text] = true
    @state[:cves] = @text.strip if @text
    @text = nil
  when "risk_factor"
    return if not in_tag("result")
    return if not in_tag("nvt")

    #we do this to clean out the buffer so to speak
    #if we don't set text to nil now, the text will show up later
    @state[:has_text] = true
    @text = nil
  when "cvss_base"
    return if not in_tag("result")
    return if not in_tag("nvt")
    @state[:has_text] = true
    @text = nil
  when "subnet"
    @state[:has_text] = true
    @text = nil
  when "result"
    return if not in_tag("results")
    record_vuln
  when "threat"
    return if not in_tag("ports")
    return if not in_tag("port")
    @state[:has_text] = true

    if not @text.index('(')
      @state[:name] = nil
      @state[:port] = nil
      @state[:proto] = nil
      @text = nil
      return
    end

    @state[:name] = @text.split(' ')[0] if @text
    @state[:port] = @text.split('(')[1].split('/')[0] if @text
    @state[:proto] = @text.split('(')[1].split('/')[1].split(')')[0] if @text

    @text = nil
  when "host"
    if in_tag('result')
      @state[:has_text] = true
      @state[:host] = @text.strip if @text
      @text = nil
    elsif in_tag('ports')
      return if not in_tag('port')
      @state[:has_text] = true
      @state[:host] = @text.strip if @text
      @text = nil
    end
  when "port"
    if in_tag('result')
      @state[:has_text] = true
      if not @text.index('(')
        @state[:proto] = nil
        @state[:port] = nil
        @text = nil
        return
      end
      @state[:proto] = @text.split('(')[0].strip if @text
      @state[:port] = @text.split('(')[1].split('/')[0].gsub(/\)/, '') if @text
      @text = nil
    elsif in_tag('ports')
      record_service
    end
  when "name"
    return if not in_tag("result")
    @state[:has_text] = true
    @text = nil
  end
  @state[:current_tag].delete name
end
record_service() click to toggle source
# File lib/rex/parser/openvas_nokogiri.rb, line 152
def record_service
  return if not @state[:name]

  service_info = {}
  service_info[:host] = @state[:host]
  service_info[:name] = @state[:name]
  service_info[:port] = @state[:port]
  service_info[:proto] = @state[:proto]

  db_report(:service, service_info)

  host_info = {}
  host_info[:host] = @state[:host]

  db_report(:host, host_info)
end
record_vuln() click to toggle source
# File lib/rex/parser/openvas_nokogiri.rb, line 119
def record_vuln
  if (@state[:cves] and @state[:cves] == "NOCVE")  and (@state[:bid] and @state[:bid] == "NOBID")
    return
  end

  if @state[:cves] and @state[:cves] != "NOCVE" and !@state[:cves].empty?
    @state[:cves].split(',').each do |cve|
      vuln_info = {}
      vuln_info[:host] = @state[:host]
      vuln_info[:refs] = normalize_references([{ :source => "CVE", :value => cve}])
      vuln_info[:name] = @state[:vuln_name]
      vuln_info[:info] = @state[:vuln_desc]
      vuln_info[:port] = @state[:port]
      vuln_info[:proto] = @state[:proto]

      db_report(:vuln, vuln_info)
    end
  end
  if @state[:bid] and @state[:bid] != "NOBID" and !@state[:bid].empty?
    @state[:bid].split(',').each do |bid|
      vuln_info = {}
      vuln_info[:host] = @state[:host]
      vuln_info[:refs] = normalize_references([{ :source => "BID", :value => bid}])
      vuln_info[:name] = @state[:vuln_name]
      vuln_info[:info] = @state[:vuln_desc]
      vuln_info[:port] = @state[:port]
      vuln_info[:proto] = @state[:proto]

      db_report(:vuln, vuln_info)
    end
  end
end
start_element(name=nil,attrs=[]) click to toggle source

ourselves with the @state variable, turning things on when we get here (and turning things off when we exit in end_element()).

# File lib/rex/parser/openvas_nokogiri.rb, line 13
def start_element(name=nil,attrs=[])
  attrs = normalize_attrs(attrs)
  block = @block
  @state[:current_tag][name] = true
  case name
  when "host"
    @state[:has_text] = true
  end
end