Tag Archives: hacking

HeartBleed – Exploiting the net “CVE-2014-0160”

 

heartbleed

Heartbleed has the potential to be one of the biggest most widespread vulnerability in the history of the modern Internet, at the root of Heartbleed is encryption. The internet has a set of protocols for security and encryption commonly known as “Security Socket Layers” S.S.L and its successor “Transport Layer Security” T.L.S, the most common implementation of SSL and TLS is a set of open source tools known as OpenSSL.

More information are available here : http://thehackernews.com/2014/04/heartbleed-bug-explained-10-most.html

You can test if your website is vulnerable to Heartbleed attack from this website : https://filippo.io/Heartbleed , well I was thinking about creating a tool that would test a list of websites “TOP 1 Million websites in my case” and if the script finds the target vulnerable it send an email to the webmaster telling him that he should fix it !

I have created that tool and its available for download here : https://github.com/MrNasro/heartbleed/

Before using the tool you need to change the following inside “exploit.py” :

fromaddr = ‘sender@email.com’
username = ’email_username’
password = ’email_password’
server = smtplib.SMTP(‘smtp.gmail.com:587’)

After the changes just just place the list of CSV domain names into the script directory and run it from the command line : python heartbleed.py

Screen Shot 2014-04-18 at 6.03.03 PM

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Vault app isn’t that secure !

Hi,

Some of us ( like me ) depend on vault to hide and secure their contacts, sms, pics and videos .. I figured out that this app takes sometime to load after the phone is booted, so this really gives us access to protected apps like “Contacts” before it loads !

This is a test video I’ll investigate that behavior and will let you know guys if I find anything in a detailed future post :

HAPPY HACKIN’ 🙂

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How I saved your a** from the ZynOS (rom-0) attack !! ( Full disclosure )

Hello everyone, I just wanted to discuss some vulnerability I found and exploited for GOODNESS .. just so that SCRIPT KIDIES won’t attack your home/business network .

Well, in Algeria the main ISP ( Algerie Telecom ) provide you with a router when you pay for an internet plan. So you can conclude that every subscriber is using that router . TD-W8951ND is one of them, I did some ip scanning and I found that every router is using ZYXEL embedded firmware.

Analysis :

Let’s download an update and take a look at it and try to find some vulnerabilities. ( http://www.tp-link.com/Resources/software/TD-W8951ND_V3.0_110729_FI.rar )

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The ras file is in LIF format !! …
Hmmm let’s put that file for Binwalk test for God’s sake ! ( check : http://code.google.com/p/binwalk/wiki/Installation for more informations on how to install it ).

This is what Binwalk told me about that file :
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You can clearly see and confirm that the router is using zynos firmware. We can also see that there is two blocks of LZMA compressed data … let’s extract them and have a look.
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The problem is that when I tried to decompress the two blocks I get an error : ” Compressed data is corrupt “Image

Hmm, first the “ras” file was in LIF format .. and now the lzma compress blocks are corrupted !!
I googled this and tried to find a solution for this, FOUND NOTHING . How am I going to solve this ??
One idea came in my mind .. “Strings” command and here is what I got :

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Aaaah ! so the blocks aren’t compressed with LZMA or anything ! and the whole “ras” firmware file is just big chunk of data in clear text.
Ok, let’s try and find some useful STRINGS …

After some time searching “I” didn’t find the useful thing that will help us find vulnerabilities on the firmware !!

I didn’t give up …
I just was thinking and questioning :

  • Me: What do you want from this firmware file !
  • Me: I want to find remote vulnerabilities that will help me extract the “admin” password.
  • Me: Does the web interface let you save the current configuration ?

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  • Me: yes !!
  • Me: Is the page password protected ?

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  • Me: No !!! I tired to access that page on a different IP and it didn’t require a passowrd !

Ok, enough questions haha ..

Now, when I activated TamperData and clicked “ROMFILE SAVE”  I’ve found out that the rom-0 file is located on “IP/rom-0” and the directory isn’t password protected or anything.

So we are able to download the configuration file which contains the “admin” password. I took a look at rom-0 file and couldn’t figure out how to reverse-engineer it, and when you don’t know something it’s not a shame to ask for help .. and that’s what I did !
I contacted “Craig” from devttys0.com, he is an expect when it comes to hacking embdded devices . He’s a great guy and he replied to my email and pointed me to http://50.57.229.26/zynos.php which is a free rom-0 file decompressor .

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When you upload and submit the rom-0 file there, the php page replies back with the configuration in clear text ( INCLUDING THE PASSWORD ) .

So what i need to do now is to automate the process of :

  • Download rom-0 file.
  • Upload it to http://50.57.229.26/zynos.php
  • get the repy back and extract the admin password from it.
  • loop this process to a range of ip addresses.

And that’s exactly what I did, I opened an OLD OLD poc python script of mine that accessed routers via telnet using the default passwords. So what I just need to do now is to add some functionality to it.

Well I thought about  this, and I’m posting this script online ONLY FOR EDUCATIONAL PURPOSES.

You can find the scripts here : https://github.com/MrNasro/zynos-attacker/

Demo :

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PS : I OWN ALL THE IP RANGE I WAS SCANNING ” FOR SURE 😉 “

Prevention :

Now ! how do you prevent attackers from downloading your rom-0 configuration file and manipulating your router ? This is pretty simple if you think about it ..
You just have to forward port 80 on the router to and inused IP address on your network :
forward

THATS ALL, or if you want to play a little with attackers that are using scripts too .. just forward port 80 to you local http server and put a LARGE file in the root directory and name it rom-0 .. just let them download like 1GB rom-0 file haha haha .. I have also automated the process of port forwarding and I’m running the scripts daily just to prevent hackers from attacking weak users …

In the next post I’ll demonstrate how would a malicious hacker exploit this to hack TONS of networks and get a meterpreter/reverse_shell on every PC on the target network ..

Hope you enjoyed this analysis, if you have anything to add or any questions to ask don’t hesitate to contact me ! BE THEIR HERO, HAPPY HACKING 😉

UPDATE:

The decoded.php script is now located at : http://198.61.167.113/zynos/decoded.php , I have updated the code.py script

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