Firefox web browser updated again to patch security vulnerabilities, Sophos reports

Sophos Press Release
16% of Sophos's web visitors are using Firefox as an alternative to Microsoft Internet Explorer.

Experts at SophosLabs™, Sophos's global network of virus and spam analysis centres, have advised businesses and home users to update their version of the Mozilla Firefox web browser, in order to protect against a series of critical security flaws.

Firefox 1.0.3 addresses a number of critical security vulnerabilities which could be exploited by malicious hackers. Proof-of-concept code which demonstrates some of the vulnerabilities is believed to have already been written.

"The increasing popularity of Firefox as an alternative web browser means that its users will be targeted by more hackers in the future, so everyone needs to keep their software up-to-date to protect against vulnerabilities," said Graham Cluley, senior technology consultant for Sophos. "With organised crime increasingly attempting to steal from innocent users through viruses, phishing attacks and spyware, no-one can afford to rest on their laurels when it comes to security."

A study conducted by Sophos has found that 16% of visitors to are using the Firefox web browser. This compares to an estimated internet average of 5%. The Firefox web browser has proven increasingly popular as an alternative to Internet Explorer, after a long history of attacks targeting users of the Microsoft product.

"People who are concerned with security visit the Sophos website to find out about the latest viruses, worms, and security issues. It's probably not surprising to see that they are also more likely than the average internet user to have switched to Firefox," continued Cluley. "Nevertheless, it's still essential that they keep on-the-ball and update themselves to this new version."

More information about the new version of Firefox, which is available for Windows, Mac OS X and Linux, can be found on Mozilla's website.

Sophos continues to recommend computer users practise safe computing as well as running up-to-date anti-virus software.

More than 100 million users in 150 countries rely on Sophos’ complete security solutions as the best protection against complex threats and data loss. Simple to deploy, manage, and use, Sophos’ award-winning encryption, endpoint security, web, email, mobile and network security solutions are backed by SophosLabs - a global network of threat intelligence centers. Sophos is headquartered in Oxford, U.K., and is publicly traded on the London Stock Exchange under the symbol “SOPH.” More information is available at