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Mozilla Foundation Security Advisory 2010-54

Title: Dangling pointer vulnerability in nsTreeSelection
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


Security researcher regenrecht reported via TippingPoint's Zero Day Initiative that there was a remaining dangling pointer issue leftover from the fix to CVE-2010-2753. Under certain circumstances one of the pointers held by a XUL tree selection could be freed and then later reused, potentially resulting in the execution of attacker-controlled memory.