[tor-bugs] #23621 [Core Tor/Tor]: prop224: Missing tons of mds over time with a lurking client
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Fri Sep 22 21:31:54 UTC 2017
#23621: prop224: Missing tons of mds over time with a lurking client
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Reporter: asn | Owner: dgoulet
Type: defect | Status: needs_review
Priority: Medium | Milestone: Tor: 0.3.2.x-final
Component: Core Tor/Tor | Version: Tor: 0.3.2.1-alpha
Severity: Normal | Resolution:
Keywords: prop224 | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
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Comment (by arma):
The {{{ClientUsageDelay}}} feature here, when set to exactly 1 hour, will
have interesting side-channel leaks. For example, if you go to a directory
guard to fetch new microdescs, it knows that there's a good chance you had
been idle but you just sent something on an existing circuit to your
primary guard.
Mike worked hard to remove those side channels in the #17592 fix (see e.g.
commit d5a151a0).
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23621#comment:10>
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