full-disclosure - Re: Google Chrome Browser Vulnerability

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Date: Thu, 4 Sep 2008 01:10:54 +0530
From: Rishi Narang <psy.echo@...il.com>
To: full-disclosure@...ts.grok.org.uk
Cc: evil fingers <contact.fingers@...il.com>
Subject: Re: Google Chrome Browser Vulnerability

Hi,

"Time" can definitely plays a major role.  There was a collision that occurred due to the fact that I took time to find the real break point in the code, search for a template and to publish at EvilFingers site before sending it to Google and other bugtraqs. 

Even though I had the vulnerability 4 hrs well before the real publication of the bug and had the exploit along with the some crash details like "int 3" Kernel Exception/Trap @ 0x01002FF3, different attack cases, exceptions of http/ftp and further debug logs; there was this bug published (though without the details of possible cases, exceptions and mouse hover techniques) couple of hours before I released it out at EvilFingers.

So, I would like to convey due credit to Mr. JanDeMooij as well for his posting the bug on http://code.google.com/p/chromium/issues/detail?id=122, and thanks to Mr. Brennan for contacting me about the same.

--
Thanks & Regards,
Rishi Narang | Security Researcher
Founder, GREYHAT Insight
Key: 0x8D67A3A3 (www.greyhat.in/key.asc) 
www.greyhat.in 

... eschew obfuscation, espouse elucidation.

Wednesday, September 3, 2008, 5:43:40 AM, you wrote:

> -----Original Message-----
> From: full-disclosure-bounces@...ts.grok.org.uk
> [mailto:full-disclosure-bounces@...ts.grok.org.uk] On Behalf Of Rishi
> Narang
> Sent: Tuesday, September 02, 2008 7:51 PM
> To: full-disclosure@...ts.grok.org.uk
> Subject: [Full-disclosure] Google Chrome Browser Vulnerability

> Hi,

> ---------------------------------------------------
> Software:
> Google Chrome Browser 0.2.149.27

> Tested:
> Windows XP Professional SP3

> Result:
> Google Chrome Crashes with All Tabs

> Problem:
> An issue exists in how chrome behaves with undefined-handlers in
> chrome.dll version 0.2.149.27. A crash can result without user
> interaction. When a user is made to visit a malicious link, which has an
> undefined handler followed by a 'special' character, the chrome crashes
> with a Google Chrome message window "Whoa! Google Chrome has crashed.
> Restart now?". It fails in dealing with the POP EBP instruction when
> pointed out by the EIP register at 0x01002FF4.

> Proof of Concept:
> http://evilfingers.com/advisory/google_chrome_poc.php

> Credit:
> Rishi Narang (psy.echo)
> www.greyhat.in
> www.evilfingers.com
> ---------------------------------------------------

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