Mozilla fixes critical Firefox bugs

The Mozilla Foundation has patched two critical security flaws recently discovered in its Firefox browser.

The Mozilla Foundation has patched two "extremely critical" security holes in its Firefox browser that were reported earlier this week. The flaws have been patched in a Firefox 1.0.4 release, which was posted to the Mozilla.org Web site on May 11.

When used in tandem, the two bugs could be used by an attacker to take control of the Firefox user's system, by exploiting the way Firefox handles software installations from certain trusted Web sites.

Firefox automatically allows software to be installed from update.mozilla.org and addons.mozilla.org, but users who want to add software from other Web sites can add to this trusted list.

Earlier The Mozilla Foundation made changes to Mozilla.org, which protected most users. But Web surfers who had added other Web sites to their trusted list were still vulnerable, said Chris Hofmann director of engineering with The Mozilla Foundation.

Danish security firm Secunia has rated the exploit as "extremely critical," marking the first time a flaw in the open-source browser had received its most serious security rating.

Firefox has gained market share against Microsoft's Internet Explorer over the past year, in part because it has been considered less vulnerable to attacks. Since the Firefox 1.0 release last November, however, a number of vulnerabilities have been discovered in the browser.

The Mozilla Foundation reports nearly 54 million Firefox downloads since the 1.0 release. Firefox has 6.8 percent of the browser market, according to WebSideStory Inc. But Internet Explorer is still used by nearly 89 percent of Web surfers, according to the research firm.

The 1.0.4 update also fixes two other minor security bugs as well as the way Firefox handles DHTML (dynamic Hypertext Markup Language), said Hofmann. The DHTML bug caused "uncaught exception" errors to pop up on some Web pages in the 1.0.3 version of the browser.

More information on the new Firefox release can be found here: http://www.mozilla.org/products/firefox/releases/1.0.4.html

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Robert McMillan

IDG News Service
Show Comments

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Tom Pope

Dynabook Portégé X30L-G

Ultimately this laptop has achieved everything I would hope for in a laptop for work, while fitting that into a form factor and weight that is remarkable.

Tom Sellers

MSI P65

This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang

MSI GT76

It really doesn’t get more “gaming laptop” than this.

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?