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Microsoft has confirmed reports of a security flaw in its Windows operating system that hackers could use to temporarily destabilize Windows 7 PCs. The software giant also acknowledged that blueprints for exploiting the flaw are now available online.

At issue is a so-called "denial-of-service" vulnerability in the component of Windows that handles the sharing of files and folders. Microsoft said attackers could use exploit code now publicly available to cause vulnerable systems to stop functioning or become unreliable. The flaw is present in Windows 7 and Windows Server 2008 R2, and does not exist in older versions of the operating system, the software giant said.

In a security bulletin published Friday, Microsoft said the vulnerability would not let attackers install malicious software or take control over an affected system, and that any ill effects from an attack on this flaw could be remedied by simply restarting the PC. In addition, the kind of computer network traffic that would be needed to exploit this flaw is easily blocked by using firewall software, such as the Windows firewall that ships with Windows 7 systems.

Source: voices.washingtonpost.com