Firefox fixes CSS-based cross-origin theft issue
Scary Beasts Security
JULY 22, 2010
Firefox just released version 3.6.7 of their excellent browser, and it fixes this: [link] This leaves 4 of the 5 major browsers with fixes (more on this in an upcoming post), which is my threshold for documenting a little tweak to exploitability. It is partially inspired by Gareth Heyes' attack on E4X using character set overrides. For interesting background reading, see: [link] Turns out, the same character set override applies to loading cross-origin CSS via the tag.
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