Mozilla Foundation Security Advisory 2010-57
Title: Crash and remote code execution in normalizeDocument
Announced: September 7, 2010
Products: Firefox, Thunderbird, SeaMonkey
Fixed in: Firefox 3.6.9
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.