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150 Ways To Bypass Web Application Firewalls In One Tool

 

A tool for testing if Web application firewalls (WAFs) are vulnerable to around 150 protocol-level evasion techniques was released at the Black Hat USA 2012 security conference on Wednesday.

The tool and the research that went into its creation are the work of Ivan Ristic, director of engineering at security vendor Qualys and the original author of the popular ModSecurity Web application firewall.

Web application firewalls are designed to protect Web applications from known attacks, such as SQL injection attacks, that are commonly used to compromise websites. They do this by intercepting requests sent by clients and enforcing strict rules about their formatting and payload.

However, there are various methods for sneaking malicious requests that violate these rules past WAFs by modifying certain parts of their headers or the paths of requested URLs. These are known as protocol-level evasion techniques, and WAFs are not properly equipped to deal with them at the moment because the techniques are not very well documented, Ristic said.

The researcher tested the evasion techniques he found primarily against ModSecurity, an open source Web application firewall, but it’s reasonable to assume that other WAFs are vulnerable to some of them as well.

In fact, Ristic said he shared a few of the techniques with others during the research stage and that they had tested them successfully against some commercial WAF products.

Erwin Huber Dohner, head of research and development at Switzerland-based WAF vendor Ergon Informatik, confirmed after seeing Ristic’s presentation that the evasion methods are a problem for the industry.

Source: Tool released at Black Hat contains 150 ways to bypass Web application firewalls | Security – InfoWorld.

The question is will this public release of research kick-start a discussion as Mr. Ristic hopes?

 

Google Docs goes offline

Great news if you use Google Docs.

Image representing Google Docs as depicted in ...

Image via CrunchBase

The Google word-processing service is a Web-based alternative to programs such as Microsoft Word. Because Google Docs is a Web-based service, people who use the application have not been able to use it unless they have an Internet connection. But now that will be changing. And people will now be able to work in Google Docs on airplanes and other places where a Web connection may not be available.

Google said that other services, like Google Presentations and Spreadsheets will soon go offline as well. The company demonstrated how the offline Google Doc feature worked in Chrome.

via Google Docs goes offline | Internet & Media – CNET News.

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