BLACK HAT: Vista ineffective against browser attacks

Share this article:

The memory protections in Windows Vista are largely ineffective at preventing browser exploitation. This was the position taken by two researchers presenting at the Black Hat conference in Las Vegas.

To prove the point, the researchers, Alexander Sotirov and Mark Dowd, showed an exploit that loaded from Internet Explorer despite all enabled memory protections built into the Vista operating system. 

In explaining the problem, the researchers said that most memory protection mechanisms are based on two things: detecting corruption and stopping common exploit patterns, and attempts to reinforce these are integral to Vista. But in many cases, some of the built-in protection mechanisms in Vista are not enabled by default for compatibility reasons.

“At the desktop level, compromises had to be made because of compatibility issues. Exploiters have a lot more control over browsers,” Sotirov said. 

And in many cases, third-party applications are not compiled to use the Vista memory protections. For example, Java and Flash are not compiled using the critical protection called ASLR.

According to the researchers, part of the reason for this situation is Microsoft's focus on Vista server processes, for which the protections are relatively effective.  

According to Sotirov, “This points up the need for more work on secure browser architecture.”

Share this article:

Sign up to our newsletters

More in News

Instagram iOS and Android apps vulnerable to session hijacking

Two researchers wrote about the Instagram app for iOS and Android is vulnerable to session hijacking because both send unsecured information through HTTP.

Report: Hackers stole data from Israeli defense firms

A report by Brian Krebs detailed the intrusions, which occurred between Oct. 2011 and Aug. 2012.

Neverquest trojan targets regional banks in Japan

Symantec researchers found a new variant of the banking trojan.