October 24, 2014

New “Highly Critical” Windows 7 Vulnerability

(LiveHacking.Com) – Microsoft are investigating a new vulnerability in Windows 7 which causes a blue screen of death (BSoD). A “researcher” named webDEVIL posted to twitter that “<iframe height=’18082563′></iframe> causes a BSoD on win 7 x64 via Safari. Lol!”  Security company Secunia then posted an advisory rating the issue as “Highly critical” as the fault can lead to system compromise and successful exploitation does not require any user interaction.

The vulnerability is due to an error in win32k.sys and can be used to corrupt memory via a specially crafted web page. Successful exploitation may allow execution of arbitrary code with kernel-mode privileges. It isn’t clear yet if an actual exploit exists or if this is just a potential hole to launch an attack.

“We are currently examining the issue and will take appropriate action to help ensure customers are protected,” Jerry Bryant, group manager of response communications for Microsoft’s Trustworthy Computing Group, said in a statement to SecurityWeek. The vulnerability is confirmed on a fully patched Windows 7 Professional 64-bit. Other versions may also be affected.

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