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Displaying articles for: April 2007

Jikto in the wild

It appears that the source code to Jikto is in the wild. I suppose it was only a matter of time, even though as you will see SPI to extreme steps to prevent this from happening.

As my Shmoocon presentation slides discuss, Jikto bypasses the "Same Origin Policy" by using a proxy website like the-cloak, proxydrop, Google Translate, etc. This allows Jikto's code and the content of 3rd party sites to be loaded into the same security domain (ie the proxy sites), and thus read the responses. I believe pdp of GNUCITIZEN first discussed this and I based much of Jikto off his work. The consequence of this means that Jikto's code had to exist somewhere on the public Internet when I did my demo. Worse, when I got to Shmoo I saw that I didn't have a hard connection to the Internet, only wireless. This means anyone in the audience sniffing traffic would see where Jikto was and get a copy. Obviously I couldn't let that happen.

Instead I VPNed into SPI. This created an encrypted tunnel. I then remotely connected to my Desktop machine at work and did the demo from there. This means no one in the audience could sniff traffic and see where Jikto was stored. The problem is if someone watched very closely they could see the URL of where Jikto's code was. I ran all my traffic on the work machine through a proxy to show all the requests Jikto was making. The first request would have been to grab Jikto's code. Someone could have seen the URL and grabbed it.

Which is exactly what happened! A guy named LogicX grabbed a copy this way and posted it on Digg just a day after Shmoocon. However I contacted LogicX and asked him to take it down. I'm thankful he did. However, it seems someone else grabbed either his copy before it was removed or grabbed the code themselves at Shmoocon just like LogicX did.

The long and short of all of this is Jikto's code is in the wild. Regardless what you might have heard, SPI didn't leak it. Even LogicX admitted he snatched it because he got lucky. I suppose it was only a matter of time.

Labels: Jikto| Shmoocon| XSS Ajax
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