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Mozilla Foundation Security Advisory 2010-19

Title: Dangling pointer vulnerability in nsPluginArray
Impact: Critical
Announced: March 30, 2010
Reporter: regenrecht (via TippingPoint's Zero Day Initiative)
Products: Firefox, SeaMonkey

Fixed in: Firefox 3.6.2
  Firefox 3.5.9
  Firefox 3.0.19
  SeaMonkey 2.0.4


Security researcher regenrecht reported via TippingPoint's Zero Day Initiative an error in the implementation of the window.navigator.plugins object. When a page reloads, the plugins array would reallocate all of its members without checking for existing references to each member. This could result in the deletion of objects for which valid pointers still exist. An attacker could use this vulnerability to crash a victim's browser and run arbitrary code on the victim's machine.


Disable JavaScript until a version containing these fixes can be installed.