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Mozilla Foundation Security Advisory 2008-01
Title: Crashes with evidence of memory corruption (rv:1.8.1.12)
Impact: Critical
Announced: February 7, 2008
Reporter: Mozilla developers and community
Products: Firefox, Thunderbird, SeaMonkey
Fixed in: Firefox 2.0.0.12
Thunderbird 2.0.0.12
SeaMonkey 1.1.8
Description
Mozilla developers identified and fixed several stability bugs in the browser engine used in Firefox 2.0.0.12 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
Jesse Ruderman, Kai Engert, Martijn Wargers, Mats Palmgren, and Paul Nickerson reported crashes in the browser engine.
Carsten Book, Wesley Garland, Igor Bukanov, moz_bug_r_a4, shutdown, Philip Taylor, and tgirmann reported crashes in the JavaScript engine.