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Mozilla Foundation Security Advisory 2010-57

Crash and remote code execution in normalizeDocument

Announced
September 7, 2010
Reporter
regenrecht
Impact
Critical
Products
Firefox, SeaMonkey, Thunderbird
Fixed in
  • Firefox 3.5.12
  • Firefox 3.6.9
  • SeaMonkey 2.0.7
  • Thunderbird 3.0.7
  • Thunderbird 3.1.3

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.

References