[tor-talk] Is Tor Browser 5.5.1 vulnerable to any of the graphite font vulnerabilities?

[Cain Ungothep]

> I would
> like to know if Tor Browser 5.5.1 is vulnerable. Thanks

Looks like it is:

https://gitweb.torproject.org/builders/tor-browser-bundle.git/commit/?id=7a36dbece35a307675f396a019dccf6e431efb44

That build corresponds to a branch which includes the commit that
supposedly fixed bug 1246093, and this commit was only pushed less than
48 hours ago.

NOTE: Torbutton's security slider at level "High" says "Some font rendering
features are disabled" and "[...] The Graphite font rendering mechanism
is disabled."  It would be good to know if this prevents the
vulnerability.

> [1]: https://www.mozilla.org/en-US/security/advisories/mfsa2016-14/
> [2]:
> http://blog.talosintel.com/2016/02/vulnerability-spotlight-libgraphite.html
> [3]:
> https://blog.torproject.org/blog/tor-browser-551-released#comment-155968