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Mozilla Foundation Security Advisory 2012-77

Some DOMWindowUtils methods bypass security checks

October 9, 2012
Johnny Stenback
Firefox, Firefox ESR, SeaMonkey, Thunderbird, Thunderbird ESR
Fixed in
  • Firefox 16
  • Firefox ESR 10.0.8
  • SeaMonkey 2.13
  • Thunderbird 16
  • Thunderbird ESR 10.0.8


Mozilla developer Johnny Stenback discovered that several methods of a feature used for testing (DOMWindowUtils) are not protected by existing security checks, allowing these methods to be called through script by web pages. This was addressed by adding the existing security checks to these methods.

In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.