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Mozilla patches known Firefox security bug

JavaScript glitch was reported last week

By Robert McMillan
May 2, 2006 12:00 PM ET

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

The bug, reported last week, involves the way Firefox handles JavaScript code. It could be exploited by attackers to crash an unpatched browser and, in theory, could also 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 in order to hasten the release of this security fix.

Release notes for the 1.5.0.3 browser can be found on the Mozilla site.

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Reprinted with permission from IDG.net. Story copyright 2010 International Data Group. All rights reserved.
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