Mozilla Foundation Security Advisory 2011-51

Mozilla Foundation Security Advisory 2011-51

Title: Cross-origin image theft on Mac with integrated Intel GPU
Impact: High
Announced: November 8, 2011
Reporter: Claus Wahlers
Products: Firefox, Thunderbird

Fixed in: Firefox 8.0
Thunderbird 8.0
Description

Claus Wahlers reported that random images from GPU memory were showing up in WebGL textures. Once incorporated into the WebGL graphics it is possible for a site to programatically read the image data and potentially gain sensitive data from other things that had been displayed earlier. This problem is due to a bug in the driver for Intel integrated GPUs on recent Mac OS X hardware, and the problem can be seen in WebGL implementations from other vendors. Mozilla has implemented a work-around to prevent this from happening with this hardware-driver combination.

References

https://bugzilla.mozilla.org/show_bug_cgi?id=684882
CVE-2011-3653