#26806: Check if Tor clients sometiems send duplicate cells on rendezvous circuits: Possible replay detected! An INTRODUCE2 cell with thesame ENCRYPTED section was seen ------------------------------+------------------------------ Reporter: s7r | Owner: (none) Type: defect | Status: new Priority: Medium | Milestone: Tor: unspecified Component: Core Tor/Tor | Version: Severity: Normal | Keywords: tor-hs Actual Points: | Parent ID: Points: | Reviewer: Sponsor: | ------------------------------+------------------------------ As my v3 onion service is getting more and more popular, I started to get: {{{ [warn] Possible replay detected! An INTRODUCE2 cell with thesame ENCRYPTED section was seen 32 seconds ago. Dropping cell. }}}
I am inclined to think that this is more like a bug in Tor, maybe due to a race condition, rather than a replay attack. I also think this is what causes #15618 - dgoulet confirmed that the warning can be reproduced every time a second `ESTABLISH_RENDEZVOUS` is sent over the same circuit. This can probably go away if we fix #21084. I am not sure if that should be a parent ticket here or not, please change if you feel like it. I think I still have yawning's tool and notes about how to reproduce #21084. -- Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26806> Tor Bug Tracker & Wiki <https://trac.torproject.org/> The Tor Project: anonymity online
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