[tor-bugs] #25574 [Core Tor/Tor]: Eliminate "silent-drop" side channels in Tor protocol

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed Mar 21 18:28:57 UTC 2018

#25574: Eliminate "silent-drop" side channels in Tor protocol
     Reporter:  mikeperry     |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  guard-discovery-stats
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:  SponsorV-can  |

 There are lots of ways to inject data into Tor streams, and this is a
 vector of attack for guard discovery and confirmation:

 I have a branch that tries to eliminate a pile of these from a while ago,
 but it has lots of false positives due to the common occurrence of invalid
 stream IDs in practice (see #25573).

 I think we may want to do #25573 before trying to merge that branch.

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25574>
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