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GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.

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  • TracTrac
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  • #12150

Closed
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Opened May 28, 2014 by Trac@tracbot

Fonts limit bypass with iframes

It is possible to bypass max font using iframe (also object/frame i guess),

1st demo shows that each iframe instance has own max_font. If you create many iframes with less than max_fonts in each, it not reset window.parent fonts. http://pastebin.com/raw.php?i=MkqVQv8x

2nd, full bruteforce script with 512 fonts array. It dynamically creates many iframes with N fonts in each. Each iframe separately executes typical js/css detection mmmmlliii script with a short given set of fonts, and sends offsetWidth/Heights to parent script via postMessage. Parent script collect all answers and then compare results. http://pastebin.com/raw.php?i=D8DWb47X

Trac:
Username: jaedo

To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information
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Reference: legacy/trac#12150