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[hackerone] Extend font randomization fingerprinting protections to also cover src:local

See original GitHub issue

Currently Brave allows sites to access a random subset of user fonts, to cause fingerprinters get a different fingerprint for each site, for each browser session.

However, recently researchers notified use src:local to have Chrome bypass these protections and query all installed fonts again. We should also apply our randomize font fingerprinting protections against alternative ways of accessing user fonts, like src:local

These researchers will be credited on HackerOne.

https://hackerone.com/reports/1598008

credit: xlin

Issue Analytics

  • State:closed
  • Created a year ago
  • Comments:7 (3 by maintainers)

github_iconTop GitHub Comments

1reaction
kjozwiakcommented, Sep 22, 2022

Removed OS/Android after speaking with @pilgrim-brave & @pes10k. The above hasn’t been implemented in Android yet so there’s nothing that QA can do in terms of verification on Android.

1reaction
LaurenWagscommented, Sep 13, 2022

@pes10k to confirm - checking src:local case on that page for all platforms and then Pseudo Fonts on macOS only is sufficient?

btw - confirmed this with @pes10k 👍🏻

Read more comments on GitHub >

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