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Mozilla Foundation Security Advisory 2015-02

Uninitialized memory use during bitmap rendering

Announced
January 13, 2015
Reporter
Michal Zalewski
Impact
High
Products
Firefox, SeaMonkey
Fixed in
  • Firefox 35
  • SeaMonkey 2.32

Description

Google security researcher Michal Zalewski reported that when a malformed bitmap image is rendered by the bitmap decoder within a <canvas> element, memory may not always be properly initialized. The resulting image then uses this uninitialized memory during rendering, allowing data to potentially leak to web content.

References