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Mozilla Foundation Security Advisory 2013-29

Title: Use-after-free in HTML Editor
Impact: Critical
Announced: March 7, 2013
Reporter: VUPEN Security
Products: Firefox, Thunderbird, SeaMonkey

Fixed in: Firefox 19.0.2
  Firefox ESR 17.0.4
  Thunderbird 17.0.4
  Thunderbird ESR 17.0.4
  SeaMonkey 2.16.1


VUPEN Security, via TippingPoint's Zero Day Initiative, reported a use-after-free within the HTML editor when content script is run by the document.execCommand() function while internal editor operations are occurring. This could allow for arbitrary code execution.