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Mozilla patches Firefox JavaScript bug
Posted by: Tweaker
Date added: 08:54, 17th April 2008 GMT
Source: Computer World News
Mozilla Corp. on Wednesday patched a single critical security vulnerability in the JavaScript engine of Firefox, updating the open-source browser to Version 2.0.0.14.
According to the associated advisory, Mozilla patched the bug primarily for stability reasons, but said that attackers might leverage crashes in JavaScript's garbage collector. "We have no demonstration that this particular crash is exploitable but are issuing this advisory because some crashes of this type have been shown to be exploitable in the past," the advisory read.
JavaScript's garbage collector reclaims memory and returns it to the system; its efficiency is an important factor in the performance of JavaScript specifically and Firefox in general.
Firefox 2.0.0.14 can be downloaded from the Mozilla site in versions for Windows, Mac OS X and Linux. Users running Firefox can call up the browser's built in updater, or wait for the automatic update notification, which typically appears within 24 to 48 hours after Mozilla posts a new version.
As with Firefox fixes issued in March, Wednesday's wasn't added to Thunderbird, even though the e-mail client uses Firefox's engine. A month ago, David Ascher, the head of Mozilla Messaging Inc. pleaded lack of resources when he explained why JavaScript bugs in Thunderbird weren't fixed, but said the e-mailer would be patched in "several weeks."
Thunderbird has not been updated since early February.
Wednesday, Mozilla again warned Thunderbird users that JavaScript was potentially dangerous because patches hadn't been applied. "Thunderbird shares the browser engine with Firefox and could be vulnerable if JavaScript were to be enabled in mail," the advisory said. "This is not the default setting and we strongly discourage users from running JavaScript in mail."
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