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Re: [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.

Indeed. We plan to get at least a new stable version (5.5.2) out today
which is based on Firefox ESR 38.6.1. Mozilla released 38.6.1 just to
address the Graphite vulnerabilities.

> 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.

Yes. Both on "High" and "Medium-High" Graphite font rendering is disabled.


>> [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

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