We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message
78,721 News Articles

Mozilla patches Firefox security bug

Javascript vulnerability fixed

Mozilla has released an update to its Firefox browser, fixing a known security flaw in the open-source software.

The bug, reported last week, relates to the way Firefox handles JavaScript code. It could be exploited by attackers to crash an unpatched browser, and, in theory, could provide them with a way to trick the browser into running malicious code, Mozilla said in a security alert.

The problem has to do with an error caused when Firefox handles certain unexpected "contentWindow.focus()" JavaScript code. It can be circumvented by disabling Firefox's JavaScript handling capability.

Users of the older Firefox 1.0 browsers and the Mozilla Suite 1.7 are not affected by the flaw, and Firefox 1.5 users should soon start to receive software patches under the browser's automatic update system.

Mozilla developers said last week that they had reduced the number of features in the 1.5.0.3 update to speed up the release of this security fix.

Release notes for the 1.5.0.3 browser can be found alert.


IDG UK Sites

LG G Watch review: Android Wear smartwatch is the best around, so far

IDG UK Sites

How to join Apple's OS X Beta Seed Program: Get OS X Yosemite on your Mac before public release

IDG UK Sites

Why the BBC iPlayer outage was caused by a DDoS attack: Topsy and Tim isn't *that* popular

IDG UK Sites

See Glasgow 2014 in UHD as history is made