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Mozilla Foundation Security Advisory 2013-39

Memory corruption while rendering grayscale PNG images

Announced
April 2, 2013
Reporter
Tobias Schula
Impact
Moderate
Products
Firefox, SeaMonkey
Fixed in
  • Firefox 20
  • SeaMonkey 2.17

Description

Mozilla community member Tobias Schula reported that if gfx.color_management.enablev4 preference is enabled manually in about:config, some grayscale PNG images will be rendered incorrectly and cause memory corruption during PNG decoding when certain color profiles are in use. A crafted PNG image could use this flaw to leak data through rendered images drawing from random memory. By default, this preference is not enabled.

References