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Mozilla Foundation Security Advisory 2014-79

Use-after-free interacting with text directionality

Announced
October 14, 2014
Reporter
regenrecht
Impact
Critical
Products
Firefox, Firefox ESR, Firefox OS, SeaMonkey, Thunderbird
Fixed in
  • Firefox 33
  • Firefox ESR 31.2
  • Firefox OS 2.2
  • SeaMonkey 2.30
  • Thunderbird 31.2

Description

Security researcher regenrecht reported, via TippingPoint's Zero Day Initiative, a use-after-free during text layout when interacting with text direction. This results in a crash which can lead to arbitrary code execution.

In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts.

References