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Mozilla Foundation Security Advisory 2008-15

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Mozilla Foundation Security Advisory 2008-15 Title: Crashes with evidence of memory corruption (rv:1.8.1.13) Impact: Critical Announced: March 25, 2008 Reporter: Mozilla developers and community Products: Firefox, Thunderbird, SeaMonkey Fixed in: Firefox 2.0.0.13 Thunderbird 2.0.0.13 SeaMonkey 1.1.9 Description Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code. Thunderbird shares the browser engine with Firefox and could be vulnerable if JavaScript were to be enabled in mail. This is not the default setting and we strongly discourage users from running JavaScript in mail. Without further investigation we cannot rule out the possibility that for some of these an attacker might be able to prepare memory for exploitation through some means other than JavaScript such as large images. Workaround Disable JavaScript until a version containing these fixes can be installed. References Tom Ferris, Seth Spitzer, Martin Wargers, John Daggett, and Mats Palmgren reported crashes in the layout engine. * Browser crashes * CVE-2008-1236 georgi, tgirmann, and Igor Bukanov reported crashes in the JavaScript engine * JavaScript engine crashes * CVE-2008-1237


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