All versions of Windows are reportedly affected. Google and Microsoft say they are working to solve the problem. Until a solution has been found, Google service users have been advised to install a hot fix supplied by Microsoft. The hot fix can reportedly block the attack until an official patch becomes available. Google also said that it has deployed various server-side defences to make the vulnerability harder to exploit. However, the company added that this is not a tenable long-term solution, and that it can't be guaranteed to be fully reliable or comprehensive.
News Source : h-online.com