Class: Yawast::Scanner::Plugins::Servers::Apache

Inherits:
Object
  • Object
show all
Defined in:
lib/scanner/plugins/servers/apache.rb

Class Method Summary collapse

Class Method Details

.check_all(uri, links = nil) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 65

def self.check_all(uri, links = nil)
  # run all the defined checks
  check_server_status(uri.copy)
  check_server_info(uri.copy)
  check_tomcat_manager(uri.copy)
  check_tomcat_version(uri.copy)
  check_tomcat_put_rce(uri.copy)
  check_struts2_samples(uri.copy)

  unless links.nil?
    check_cve_2019_0232(links)
  end
end

.check_banner(banner) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 11

def self.check_banner(banner)
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_openssl_version_exposed',
                                  {vulnerable: false, version: nil}
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_httpd_version_exposed',
                                  {vulnerable: false, version: nil}
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_httpd_modules_exposed',
                                  {vulnerable: false, modules: nil}

  # don't bother if this doesn't look like Apache
  return unless banner.include? 'Apache'
  @apache = true

  modules = banner.split(' ')
  server = modules[0]

  # fix '(distro)' issue, such as with 'Apache/2.2.22 (Ubuntu)'
  # if we don't do this, it triggers a false positive on the module check
  if /\(\w*\)/.match? modules[1]
    server += " #{modules[1]}"
    modules.delete_at 1
  end

  # print the server info no matter what we do next
  Yawast::Utilities.puts_info "Apache Server: #{server}"
  modules.delete_at 0
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_httpd_version_exposed',
                                  {vulnerable: true, version: server}

  if modules.count.positive?
    Yawast::Utilities.puts_warn 'Apache Server: Module listing enabled'
    modules.each { |mod| Yawast::Utilities.puts_warn "\t\t#{mod}" }
    puts ''
    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    'apache_httpd_modules_exposed',
                                    {vulnerable: true, modules: banner}

    # check for special items
    modules.each do |mod|
      if mod.include? 'OpenSSL'
        Yawast::Utilities.puts_warn "OpenSSL Version Disclosure: #{mod}"
        puts ''

        Yawast::Shared::Output.log_hash 'vulnerabilities',
                                        'apache_openssl_version_exposed',
                                        {vulnerable: true, version: mod}
      end
    end
  end
end

.check_cve_2019_0232(links) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 239

def self.check_cve_2019_0232(links)
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_tomcat_cve_2019_0232',
                                  {vulnerable: false, uri: nil, body: nil}

  # create a list of possible targets - this would be links that include "cgi-bin"
  targets = []
  links.each do |link|
    targets.push link if link.include? '/cgi-bin/'
  end

  # check to see if we have any targets
  unless targets.count.zero?
    # we have targets
    targets.each do |target|
      # now, we need to build the URI we'll use
      target = if target.include? '?'
                 target + '&dir'
               else
                 target + '?dir'
               end

      # now, send the request and see if it includes "<DIR>"
      target_uri = URI.parse target
      body = Yawast::Shared::Http.get(target_uri)

      if body.include? '<DIR>'
        # we have a hit

        Yawast::Utilities.puts_vuln "Apache Tomcat RCE (CVE-2019-0232): #{uri}"

        Yawast::Shared::Output.log_hash 'vulnerabilities',
                                        'apache_tomcat_cve_2019_0232',
                                        {vulnerable: true, uri: target_uri, body: body}

        break
      end
    end
  end
end

.check_page_for_string(uri, path, search) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 280

def self.check_page_for_string(uri, path, search)
  uri.path = path
  uri.query = '' unless uri.query.nil?

  body = Yawast::Shared::Http.get(uri)

  if body.include? search
    Yawast::Utilities.puts_vuln "#{search} page found: #{uri}"
    Yawast::Shared::Output.log_value 'apache', 'page_search', search, uri

    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    "apache_#{path.tr('-', '_').tr('/', '')}_found",
                                    {vulnerable: true, uri: uri, body: body}

    puts ''
  else
    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    "apache_#{path.tr('-', '_').chomp('/')}_found",
                                    {vulnerable: false, uri: uri, body: body}
  end
end

.check_server_info(uri) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 83

def self.check_server_info(uri)
  check_page_for_string uri, '/server-info', 'Apache Server Information'
end

.check_server_status(uri) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 79

def self.check_server_status(uri)
  check_page_for_string uri, '/server-status', 'Apache Server Status'
end

.check_struts2_samples(uri) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 218

def self.check_struts2_samples(uri)
  search = []
  search.push '/Struts2XMLHelloWorld/User/home.action'
  search.push '/struts2-showcase/showcase.action'
  search.push '/struts2-showcase/titles/index.action'
  search.push '/struts2-bootstrap-showcase/'
  search.push '/struts2-showcase/index.action'
  search.push '/struts2-bootstrap-showcase/index.action'
  search.push '/struts2-rest-showcase/'

  search.each do |path|
    uri = uri.copy
    uri.path = path

    ret = Yawast::Shared::Http.get_status_code uri
    Yawast::Shared::Output.log_value 'apache', 'struts2_sample_files', uri, ret

    Yawast::Utilities.puts_warn "Apache Struts2 Sample Files: #{uri}" if ret == 200
  end
end

.check_tomcat_manager(uri) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 120

def self.check_tomcat_manager(uri)
  check_tomcat_manager_paths uri.copy, 'manager', 'Manager'
  check_tomcat_manager_paths uri.copy, 'host-manager', 'Host Manager'
end

.check_tomcat_manager_passwords(uri, manager) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 165

def self.check_tomcat_manager_passwords(uri, manager)
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_tomcat_manager_weak_pass',
                                  {vulnerable: false, uri: nil, credentials: nil}
  # check for known passwords
  check_tomcat_manager_pwd_check uri, manager, 'tomcat:tomcat'
  check_tomcat_manager_pwd_check uri, manager, 'tomcat:password'
  check_tomcat_manager_pwd_check uri, manager, 'tomcat:'
  check_tomcat_manager_pwd_check uri, manager, 'admin:admin'
  check_tomcat_manager_pwd_check uri, manager, 'admin:password'
  check_tomcat_manager_pwd_check uri, manager, 'admin:'
end

.check_tomcat_manager_paths(uri, base_path, manager) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 125

def self.check_tomcat_manager_paths(uri, base_path, manager)
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_tomcat_manager_exposed',
                                  {vulnerable: false, uri: nil}
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_tomcat_host_manager_exposed',
                                  {vulnerable: false, uri: nil}

  uri.path = "/#{base_path}/html"
  uri.query = '' unless uri.query.nil?

  ret = Yawast::Shared::Http.get(uri)

  if ret.include? '<tt>conf/tomcat-users.xml</tt>'
    # this will get Tomcat 7+
    Yawast::Utilities.puts_warn "Apache Tomcat #{manager} page found: #{uri}"
    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    'apache_tomcat_manager_exposed',
                                    {vulnerable: true, uri: uri}
    check_tomcat_manager_passwords uri, manager

    puts ''
  else
    # check for Tomcat 6 and below
    uri = uri.copy
    uri.path = "/#{base_path}"
    ret = Yawast::Shared::Http.get(uri)

    if ret.include? '<tt>conf/tomcat-users.xml</tt>'
      Yawast::Utilities.puts_warn "Apache Tomcat #{manager} page found: #{uri}"
      Yawast::Shared::Output.log_hash 'vulnerabilities',
                                      'apache_tomcat_host_manager_exposed',
                                      {vulnerable: true, uri: uri}
      check_tomcat_manager_passwords uri, manager

      puts ''
    end
  end
end

.check_tomcat_manager_pwd_check(uri, manager, credentials) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 178

def self.check_tomcat_manager_pwd_check(uri, manager, credentials)
  ret = Yawast::Shared::Http.get(uri, {'Authorization' => "Basic #{Base64.encode64(credentials)}"})
  if ret.include?('<font size="+2">Tomcat Web Application Manager</font>') ||
     ret.include?('<font size="+2">Tomcat Virtual Host Manager</font>')
    Yawast::Utilities.puts_vuln "Apache Tomcat #{manager} weak password: #{credentials}"

    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    'apache_tomcat_manager_weak_pass',
                                    {vulnerable: true, uri: uri, credentials: credentials}
  end
end

.check_tomcat_put_rce(uri) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 190

def self.check_tomcat_put_rce(uri)
  # CVE-2017-12615
  uri.path = "/#{SecureRandom.hex}.jsp/"
  uri.query = '' unless uri.query.nil?

  # we'll use this to verify that it actually worked
  check_value = SecureRandom.hex

  # upload the JSP file
  req_data = "<% out.println(\"#{check_value}\");%>"
  Yawast::Shared::Http.put(uri, req_data)

  # check to see of we get check_value back
  uri.path = uri.path.chomp('/')
  res = Yawast::Shared::Http.get(uri)

  if res.include? check_value
    Yawast::Utilities.puts_vuln "Apache Tomcat PUT RCE (CVE-2017-12615): #{uri}"
    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    'apache_tomcat_cve_2017_12615',
                                    {vulnerable: true, uri: uri, check_value: check_value, body: res}
  else
    Yawast::Shared::Output.log_hash 'vulnerabilities',
                                    'apache_tomcat_cve_2017_12615',
                                    {vulnerable: false, uri: uri, check_value: check_value, body: res}
  end
end

.check_tomcat_version(uri) ⇒ Object 



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# File 'lib/scanner/plugins/servers/apache.rb', line 87

def self.check_tomcat_version(uri)
  Yawast::Shared::Output.log_hash 'vulnerabilities',
                                  'apache_tomcat_version_exposed',
                                  {vulnerable: false, version: nil, body: nil}

  begin
    req = Yawast::Shared::Http.get_http(uri)
    req.use_ssl = uri.scheme == 'https'
    headers = Yawast::Shared::Http.get_headers
    res = req.request(Xyz.new('/', headers))

    if !res.body.nil? && res.body.include?('Apache Tomcat') && res.code == '501'
      # check to see if there's a version number
      version = /Apache Tomcat\/\d*.\d*.\d*\b/.match res.body

      if !version.nil? && !version[0].nil?
        Yawast::Utilities.puts_warn "Apache Tomcat Version Found: #{version[0]}"
        Yawast::Shared::Output.log_hash 'vulnerabilities',
                                        'apache_tomcat_version_exposed',
                                        {vulnerable: true, version: version[0], body: res.body}

        puts "\t\t\"curl -X XYZ #{uri}\""

        puts ''
      else
        Yawast::Shared::Output.log_hash 'vulnerabilities',
                                        'apache_tomcat_version_exposed',
                                        {vulnerable: false, version: nil, body: res.body}
      end
    end
  end
end