[tor-bugs] #22971 [Applications/Tor Browser]: The XPI signing mechanism needs to use different hash functions.

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#22971: The XPI signing mechanism needs to use different hash functions.
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 Reporter:  yawning                   |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  High                      |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Major                     |     Resolution:
 Keywords:  tbb-security              |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by gk):

 Replying to [comment:5 yawning]:
 > If I were to try to mitigate this without breaking things for lots of
 users, I would replace the SHA1 implementation used for XPI verification
 with the hardened variant that came out of the shattered.io research.
 >
 > https://github.com/cr-marcstevens/sha1collisiondetection

 Sounds like a useful thing to look at, thanks.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22971#comment:6>
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