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Thursday, May 28, 2009 3:37 PM

Good Bug

Credit goes to Alex "Kuza55" Kouzemtchenko for identifying a weakness in the XSS Filter OBJECT tag heuristic. The original heuristic failed to properly sanitize OBJECT tags with the DATA attribute set. Alex found that it is possible to use the DATA attribute
Posted by dross | 1 Comments
Monday, April 06, 2009 10:21 AM

The MSHTML (Trident) Host Security FAQ

I've posted a two-part FAQ addressing security considerations for apps that host MSHTML. Check it out over at the SRD blog ! The MSHTML Host Security FAQ: Part I of II The MSHTML Host Security FAQ: Part II of II
Posted by dross | 0 Comments
Wednesday, March 25, 2009 11:33 AM

New webappsec tools

Chris Weber's Watcher: http://www.lookout.net/2009/03/20/watcher-security-tool-a-free-web-app-security-testing-and-compliance-auditing-tool/ Watcher plugs into the Fidder HTTP proxy and monitors for all sorts of web app vulns, from the common to the obscure.
Posted by dross | 1 Comments
Thursday, March 19, 2009 1:02 PM

IE8 is here!

http://www.microsoft.com/ie What are you waiting for? Go get it!
Posted by dross | 1 Comments
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Friday, January 30, 2009 1:30 PM

XSS Filter Improvements in IE8 RC1

I've just posted detail up on the SVRD Blog about some improvements and bug fixes to the XSS Filter feature in IE8 RC1 .
Posted by dross | 1 Comments
Friday, August 29, 2008 3:18 PM

IE8 Beta 2

If you haven’t already seen, Internet Explorer 8 Beta 2 is out – go get it ! Now is a good time to thank everyone who helped make the IE8 XSS Filter a reality. This project wouldn’t have been possible without your hard work, support, leadership, guidance,
Posted by dross | 0 Comments
Tuesday, August 19, 2008 4:29 PM

IE 8 XSS Filter Architecture / Implementation revealed + some other news

I've just posted some detail on the Internet Explorer 8 XSS Filter Architecture / Implementation over on the SWI Blog . It would be great to get some feedback and answer any questions you may have -- just drop me a mail using the Email link to the left.
Posted by dross | 1 Comments
Thursday, July 03, 2008 11:55 PM

IE8 XSS Filter design philosophy in-depth

It's great to see some positive reaction to the potential of our XSS Filter. Now we just need to deliver! In this blog post I’ll try to shed some light on our design philosophy. To understand how we have arrived at our current filtering approach, it is
Posted by dross | 3 Comments
Wednesday, July 02, 2008 9:29 AM

IE8 goes on the offensive against XSS!

IE has announced the new XSS Filter feature which will debut in IE8 Beta 2! Stay tuned to my blog in the coming weeks for more details on how the filter works, its history, its limitations, and some lessons learned during the development process.
Posted by dross | 1 Comments
Monday, March 10, 2008 1:06 PM

XSS-Focused Attack Surface Reduction

All web browsers expose what have been referred to as XSS “attack vectors” – various techniques that XSS attacks can leverage to achieve script execution. The best and most well regarded list of these behaviors is RSnake’s XSS Cheat Sheet . The existence
Posted by dross | 4 Comments
Wednesday, February 06, 2008 10:21 AM

The Kill-Bit FAQ - Part 1 of 3 posted to SVRD blog

Check out my ActiveX Kill-Bit FAQ which is now being posted to the SVRD blog . There are three parts, the first of which is now live. Parts two and three should be up by the end of the week.
Posted by dross | 0 Comments
Wednesday, August 22, 2007 12:48 PM

An innovative new defense against cross-domain vulnerabilities

Cross-domain (or “Universal XSS”) vulnerabilities have long plagued modern script-enabled web browsers. Shuo Chen of Microsoft Research has developed a new type of defense against these vulnerabilities. A paper on this new approach has been accepted to
Posted by dross | 1 Comments
Monday, July 09, 2007 3:15 PM

Notes on DNS Pinning

Christian Matthies has an excellent writeup on DNS Pinning (with diagrams!) If you're tuned into web app security you've probably noticed a lot of discussion around Anti DNS Pinning a.k.a. DNS Rebinding a.k.a. Quick-Swap DNS lately. You're likely to see
Posted by dross | 1 Comments
Thursday, November 16, 2006 1:35 PM

eval() and document.write(), meet Execute and ExecuteGlobal

Be on the lookout for these two VBScript statements that can be used to achieve the same effect as eval() and document.write(): Execute and ExecuteGlobal . Jonathan Ness pointed me to an exploit sample that was using Execute, presumably to trip up any
Posted by dross | 0 Comments
Thursday, October 05, 2006 12:10 PM

Recursive Obfuscation

Thanks to Jonathan Ness for pointing me to an example of a new obfuscation technique that attempts to thwart the eval() à alert() trick . Take a look at the following obfuscation script: 1 <script> 2 function N(F,D) 3 { 4 if (!D) D = ' "#%()-./012348:;<=>@ACEGHILMOPRTVWY\\]_abcdefghijlmnopqrstuvwxyz';
Posted by dross | 0 Comments
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