[tor-bugs] #15951 [Tor]: FairPretender: Pretend as any hidden service in passive mode

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#15951: FairPretender: Pretend as any hidden service in passive mode
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     Reporter:  twim    |      Owner:  twim
         Type:  defect  |     Status:  new
     Priority:  major   |  Milestone:
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:  tor, hs, descriptor, tor-hs
Actual Points:          |  Parent ID:
       Points:          |
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Comment (by arma):

 Replying to [comment:1 twim]:
 > Roger (arma) have another idea how to fix it. Roger, please describe it
 here.

 I think the other idea was for the INTRO2 cell to specify what onion
 address the user thought she was going to. Then hidden services can notice
 when clients are visiting them but aren't using the right address.

 That approach provides more defense-in-depth against future variations on
 this issue. I think it's complementary to Nick's cross-certification plan.

 I also agree with Yawning that fixing this particular variant of the issue
 isn't super-urgent, since ultimately it requires tricking the user into
 visiting the wrong address, which is going to be bad news for the user in
 plenty of other ways too.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15951#comment:6>
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