[tor-bugs] #33962 [Applications/Tor Browser]: Uplift patch for 5741 (dns leak protection)

Tue May 12 07:29:06 UTC 2020

#33962: Uplift patch for 5741 (dns leak protection)
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 Reporter:  acat                                 |          Owner:  acat
     Type:  task                                 |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ReleaseTrainMigration                |  Actual Points:
  TorBrowserTeam202005R                          |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor58
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Comment (by acat):

 Note: I missed a path (which should not affect us), so trying to get this
 followup landed too: https://phabricator.services.mozilla.com/D74626.

 The issue is that already cached entries (when `network.dns.disabled =
 false`) may result in network connection much later when
 `network.dns.disabled = true`, as they are asynchronously renewed when
 they expire. This should not affect us in the sense that if we set
 `network.dns.disabled = true` right from the beginning, the only cached
 entries would be IP literals, which never expire.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33962#comment:9>
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