Critical flaws fixed in Firefox 3.5.4

Graham Cluley

If your a user of the Firefox web browser then it’s time to update your software again, as Mozilla has issued an important update that fixes a number of critical flaws.

In total, 16 vulnerabilities are patched in Firefox 3.5.4 – with 11 given the highest rating of “critical”. What does that mean? Well, according to Mozilla’s own website a “critical” vulnerability is one which “can be used to run attacker code and install software, requiring no user interaction beyond normal browsing.”

In other words, critical vulnerabilities can be used to invisibly install and run malicious code on your computer – such as a Trojan horse or worm.

As we revealed in the Sophos Threat Report [PDF]

Read more in my article on the Naked Security website.

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Graham Cluley is a veteran of the anti-virus industry having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent security analyst, he regularly makes media appearances and is an international public speaker on the topic of computer security, hackers, and online privacy. Follow him on Twitter at @gcluley, or drop him an email.