Mozilla patches 11 serious bugs in older Firefox 3

Support clock's ticking; security updates for Firefox 3 to continue until January

Mozilla yesterday patched 11 vulnerabilities, 10 of them critical, in Firefox 3.0, the browser that has another few months to live.

The update to Firefox 3.0.12 was the first since Mozilla launched the brand-new Firefox 3.5 at the end of June. As is its practice, Mozilla will discontinue support and stop security updates for the older edition approximately six months after the release of 3.5. It has set Firefox 3.0's "kill date" as sometime in January 2010.

Of the 11 flaws fixed in Firefox 3.0.12 -- the same number patched in the previous security update -- 10 were rated critical and one as "high" in Mozilla's four-step system. Danish bug tracker Secunia ranked the bunch as "highly critical," it's second-from-the-top tag.

Five of the 11 vulnerabilities are in the browser's rendering engine, a frequent target of Mozilla's patching. "Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code," said Mozilla in the accompanying advisory. It urged users to disable JavaScript if Firefox could not be immediately updated to 3.0.12.

Mozilla also patched critical vulnerabilities in Firefox's use of Adobe Flash, in open-source font-rendering libraries and in several other parts of the browser.

Eight of the 11 vulnerabilities patched Tuesday have already been addressed in the original version of Firefox 3.5, or the update to 3.5.1. that Mozilla rushed out last week to quash a zero-day bug.

It's not unheard of for Mozilla to patch one version of its browser while leaving another temporarily vulnerable. When the company has done that, it has patched the newest edition first, then backtracked to update the older version later, as it did in this case.

Mozilla plans to update Firefox 3.5 again -- later this month or early in August -- with the patches it had originally scheduled for 3.5.1. "[The] goal of this release should be a quick-turnaround [with] topcrash [and] security/stability patches," Mozilla said in notes published after a weekly status meeting.

Firefox 3.0.12 can be downloaded for Windows, Mac OS X and Linux, but current users can also call up their browser's built-in updater or wait for the automatic update notification, which should pop up in the next 48 hours.

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.

Tags firefox 3.0mozilla 3exploits and vulnerabilitiesmozilla firefox

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.
Gregg Keizer

Gregg Keizer

Computerworld
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Cathy Giles

Brother MFC-L8900CDW

The Brother MFC-L8900CDW is an absolute stand out. I struggle to fault it.

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Featured Content

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?