Google Researchers Find "Worst" Windows RCE Flaw

8.5.2017 securityweek Vulnerebility
Google Project Zero researchers Tavis Ormandy and Natalie Silvanovich claim to have found a critical vulnerability in Windows. The details of the flaw will likely be disclosed in 90 days from now even if a patch is not available.

Ormandy announced over the weekend on Twitter that he and Silvanovich had discovered “the worst Windows remote code exec [vulnerability] in recent memory.”

The expert has not shared any details, but he has clarified that the exploit they created works against default Windows installations, and the attacker does not need to be on the same local area network as the victim. He also said the attack is “wormable.”

Despite not releasing any technical details on the vulnerability, some members of the industry have criticized the Google Project Zero researchers for making the existence of the flaw public.

Natalie Silvanovich @natashenka
If a tweet is causing panic or confusion in your organization, the problem isn't the tweet, the problem is your organization
7:58 PM - 6 May 2017
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SecurityWeek has reached out to Microsoft for comment and will update this article if the company responds.

Google typically gives companies 90 days to patch vulnerabilities found by its researchers before making their details public, but the deadline is only 7 days if the weakness has been exploited in attacks.

In November, Project Zero disclosed the details of an actively exploited zero-day affecting the Windows kernel after Microsoft failed to release a fix.

More recently, in February, Google researcher Ivan Fratric made public the details and proof-of-concept (PoC) code for a potentially serious vulnerability affecting the Edge and Internet Explorer browsers. Microsoft patched the vulnerability a few weeks later.

In the past years, Google disclosed the details of several Windows vulnerabilities after 90 days. The search giant made some changes to its disclosure policy in February 2015 due to criticism from Microsoft and members of the industry, but the company continues to strictly apply its 90-day deadline.