Opera uses Mozilla fuzzer to find, fix severe browser flaw

Summary:Using a JavaScript fuzzer released by Mozilla at Black Hat, Opera's security team has found and fix a "highly severe" browser flaw that could be used in code execution attacks.

Opera uses Mozilla fuzzer to find, fix flaw
How's this for cross-browser cooperation?

Using a JavaScript fuzzer released by Mozilla at Black Hat, Opera's security team has found and fixed a "highly severe" browser flaw that could be used in code execution attacks.

The problem:

A virtual function call on an invalid pointer that may reference data crafted by the attacker can be used to execute arbitrary code.

The flaw was found with jsfunfuzz, a JavaScript compiler/decompiler fuzzer built by Jesse Ruderman and released earlier this month by Mozilla security chief Window Snyder.

It is the first in a series of security tools that will be released by the open-source group.

Snyder said all the major browser vendors -- Opera and Microsoft -- were giving the fuzzer ahead of time and they were all comfortable with the idea of making it available to the public.

Topics: Browser

About

Ryan Naraine is a journalist and social media enthusiast specializing in Internet and computer security issues. He is currently security evangelist at Kaspersky Lab, an anti-malware company with operations around the globe. He is taking a leadership role in developing the company's online community initiative around secure content managem... Full Bio

zdnet_core.socialButton.googleLabel Contact Disclosure

Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.

Related Stories

The best of ZDNet, delivered

You have been successfully signed up. To sign up for more newsletters or to manage your account, visit the Newsletter Subscription Center.
Subscription failed.