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Mozilla Foundation Security Advisory 2010-57
Title: Crash and remote code execution in normalizeDocument
Impact: Critical
Announced: September 7, 2010
Reporter: regenrecht
Products: Firefox, Thunderbird, SeaMonkey
Fixed in: Firefox 3.6.9
Firefox 3.5.12
Thunderbird 3.1.3
Thunderbird 3.0.7
SeaMonkey 2.0.7
Description
Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that code used to normalize a document contained a logical flaw that could be leveraged to run arbitrary code. When the normalization code ran, a static count of the document's child nodes was used in the traversal, so a page could be constructed that would remove DOM nodes during this normalization which could lead to the accessing of a deleted object and potentially the execution of attacker-controlled memory.
Workaround
Disable JavaScript or install NoScript until a version containing these fixes can be installed.
