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Yersterday we posted about a bypass that was dicovered to defeat Windows Genuine Advantage Check and asked Microsoft to respond to these findings.

Below is an email response I received from Jed Rose, an expert community leader at Microsoft.

As software pirates have become increasingly sophisticated, Microsoft has sought to keep a step ahead of them by introducing more advanced solutions, such as WGA. With WGA, Microsoft seeks to balance the needs of easily providing its customers the updates they need while differentiating the value of genuine Windows software from counterfeit software. We expected that counterfeiters would try a number of methods to circumvent the safeguards provided by WGA, so this isn’t a surprise. But to be clear this attempt represents very little threat to Microsoft or its customers because the code generated by the validation tool expires quickly, so it would be very difficult to share. Continued in Read more

View: Yesterdays Article: Bypass found for Windows piracy check

It is important to note that this issue is not a security vulnerability or a hack that puts customers at any risk, nor is it a vulnerability in the activeX control WGA uses to determine if a customer is running genuine Windows. This is simply an issue of users taking a validation code from a genuine copy of Windows and using it on a non-genuine copy of Windows. The threat is similar to that posed by the illegal distribution of software burned to CDs.

Of course a counterfeiter could use this method to steal software for themselves, but because the code expires quickly, it would be useless to share the code with any other users.

Q: Who would benefit from this practice?
A: This method of counterfeiting is only an option for relatively sophisticated users who are running both a genuine version of Windows (from which they would take the code) and a non-genuine version (to which they would apply it). This method only applies to the Download Center, where customers would need to know exactly what to look for, and not Windows Update or the Automatic Updates feature that most customers use.

Q: How does the code expire?
A: Microsoft “hashes” the PID returned from the validation tool (genuinecheck.exe) with a Microsoft.com timeserver time code that is checked by the page logic on the Download Center, which means the code is only valid for a short period of time.

Q: Does Microsoft have plans to change or improve WGA validation to address this vulnerability?
A: With WGA, Microsoft seeks to balance the need to make downloads easily available for customers, while trying to safeguard our IP from counterfeiters. In striking this balance, Microsoft will defer to the needs of its customers to validate their computers as easily as possible so that they can receive the updates they need to stay secure. Furthermore, because the code generated by the validation tool expires so quickly, we don’t perceive this as an issue significant enough to outweigh our customers’ needs for hassle-free downloads.