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Ticket Summary Keywords Status Owner Type Priority
#29607 2019 Q1: Denial of service on v2 and v3 onion service tor-hs, tor-dos, network-team-roadmap-2019-Q1Q2, security, 041-longterm, 041-deferred-20190530, 042-deferred-20190918 needs_information pidgin defect Immediate
#4580 Some Tor clients go nuts requesting the consensus if there is no recent enough consensus tor-client, tor-dos zombies deprecation new defect High
#4581 Dir auths should defend themselves from too many begindir requests per address prop258, tor-dos, tor-dirauth needs_revision defect High
#7572 Make relay crypto run on multiple CPU cores tor-relay, term-project-ideas, tor-dos multithreading performance cpu assigned yawning defect High
#13737 Move circuit building crypto to worker tor-client, tor-hs, multicore, performance, tor-dos, term-project-ideas intro assigned yawning enhancement High
#15940 Make a standard transition plan for killing off a client version SponsorS, tor-dos-designs, 034-triage-20180328, 034-removed-20180328 assigned task High
#15941 Form a plan for killing off client versions which assume they'll live forever SponsorS, needs-proposal, tor-dos-designs, 034-triage-20180328, 034-removed-20180328 assigned task High
#18346 Separate the various roles that directory authorities play, from a configuration POV prop257, dirauth, tor-dos, security, needs-design assigned enhancement High
#18636 Write sub-proposals for each part of prop257: Refactoring authorities. Implement as appropriate. dirauth, needs-proposal, tor-dos, tor-dos-designs, term-project, research-program, 034-triage-20180328, 034-removed-20180328 assigned project High
#18637 Have OOM handler look at all memory consumption, not just some tor-dos oom memory-handler memory-monitoring assigned enhancement High
#18641 Teach the OOM handler about uploaded descriptors on a dirauth. tor-dos, tor-dirauth, oom assigned enhancement High
#19984 Use a better set of comparison/evaluation functions for deciding which connections to kill when OOS sockets, tor-dos, 034-triage-20180328, 034-removed-20180328 assigned defect High
#25141 enabling CellStatistics results in gigabytes of incremental memory consumption 029-backport, tor-dos, 034-triage-20180328, 034-removed-20180328, 031-unreached-backport new defect High
#25372 relay: Allocation for compression goes very high tor-relay, compression, tor-dos, review-group-34, 034-triage-20180328, performance, oom, 034-removed-must-2018-09-05, regression?, 040-deferred-20190220, 033-unreached-backport new defect High
#2664 DoS and failure resistence improvements SponsorZ-large, tor-dirauth, tor-dos new enhancement Medium
#2681 brainstorm ways to let Tor clients use yesterday's consensus more safely prop212, tor-client, small-feature, tor-dos-dirauth, low-bandwidth, sponsor4, sponsor8-maybe, 034-triage-20180328, 034-removed-20180328 035-removed sponsor8-removed new enhancement Medium
#3029 We should save received documents before parsing them lorax, tor-dirauth, debugging, diagnostic, tor-dos new enhancement Medium
#6777 add config option to not rate limit authority dir conns tor-dirauth, rate-limit, easy, tor-dos new defect Medium
#6790 Write proposal draft for directory mirrors to accept, aggregate and hand off descriptors to dirauths needs-proposal, tor-dos-dirauth, tor-dirauth new enhancement Medium
#9390 Warn if you're being a public relay but have too-low file descriptor limit tor-relay, easy, dos, resources, logging, 033-triage-20180320, 033-removed-20180320, reviewer-was-teor-20190422 needs_revision enhancement Medium
#14006 Hidden service error: "We'd like to launch a circuit to handle a connection, but we already have 32 general-purpose client circuits..." tor-hs, circuit-management, scaling, 033-triage-20180320, 033-removed-20180320, 033-removed-20180403, tor-dos needs_information defect Medium
#16059 Add a "rendezvous approver" control API tor-hs, tor-control, needs-proposal, term-project-ideas tor-dos new enhancement Medium
#17254 Scalable HSes by splitting intro/rendezvous tor-hs multicore scaling tor-dos needs_revision TvdW enhancement Medium
#17640 Handle CREATE/CREATED cell processing gracefully under load. tor-hs, scaling, tor-dos, tor-relay assigned yawning enhancement Medium
#17806 Make onion queues rational, combine with workqueue logic. intro, term-project-ideas, tor-dos, cpuworker, multithreading, multicore, needs-cs, 034-triage-20180328, 034-removed-20180328 new enhancement Medium
#18320 Clear old entries from the key-pinning journal file tor-dos, 034-triage-20180328, 034-removed-20180328 new enhancement Medium
#18635 Make a design for circuit- migration in the event of DoS tor-dos, tor-dos-designs, research-program research-project new project Medium
#18638 Write a proposal for PK handshake that uses more client resources than server. tor-dos, tor-dos-designs, research-program assigned yawning task Medium
#18643 Replace the most error-prone binary parsers with trunnel tor-dos security tor-relay tor-client technical-debt parsing trunnel new enhancement Medium
#18644 Replace our routerparse.c core with something machine-generated tor-dos security tor-relay tor-client technical-debt parsing new task Medium
#18645 Replace our http parser with something machine-generated tor-dos security tor-relay tor-client technical-debt parsing new task Medium
#18646 Generalize our OOM-handler to an OODisk handler tor-dos, sponsor8-maybe, diskspace, 034-triage-20180328, 034-removed-20180328, 035-removed-20180711 new enhancement Medium
#18852 Directory mirrors should check accounting usage more frequently tor-relay, directory, mirror, accounting, usage, bandwidth, tor-dos new defect Medium
#19304 Write a proposal for having dirauths push to fallbacks, rather than pull. prop256, tor-dirauth, needs-proposal, tor-dos, tor-dos-designs, term-project new task Medium
#19305 Write a proposal for separating "upload descriptors here" from the rest of what dirauths do. prop256, dirauth, needs-proposal, tor-dos, tor-dos-designs tor-dirauth term-project new task Medium
#19306 Write a proposal for removing liveness-testing from dirauths. prop256, dirauth, needs-proposal, tor-dos, tor-dos-designs tor-dirauth torflow research-program new task Medium
#19377 Consider retry/backoff behavior when building new circuits tor-dos refactor circuit-build object-model new task Medium
#24797 Add an option that makes Tor use fewer connections tor-relay, tor-dos, 034-triage-20180328, 034-removed-20180328, 035-removed-20180711 needs_revision neel enhancement Medium
#24815 Validate shared random state dates before each voting period tor-sr, tor-dos, 034-triage-20180328, 034-removed-20180328, 031-unreached-backport, 032-unreached-backport assigned asn defect Medium
#24899 [feature request] Increase the limit on pending client circuits with the number of onion services tor-hs, ddos-risk, 034-triage-20180328, 034-removed-20180328 new enhancement Medium
#24973 Tor should be more gentle when launching dozens of circuits at once tor-dos, tor-hs, performance, 034-triage-20180328, 034-removed-20180502, network-team-roadmap-2019-Q1Q2 needs_information defect Medium
#25208 Relays can upload a new descriptor every 2 minutes tor-dos-related?, crash?, regression?, 033-triage-20180320, 033-included-20180320, 035-removed-20180711, 034-removed-must-2018-09-05, 033-unreached-backport new defect Medium
#26294 attacker can force intro point rotation by ddos tor-hs, tor-dos, network-team-roadmap-august, security merge_ready asn defect Medium
#26359 DoS and timed attacks via unencrypted network time protocols time, NTP, DoS, attack, clock-skew new defect Medium
#27921 apparent DOS / impairment-of-service against FallbackDirs using DIR requests, please evaluate for possible mitigation tor-dos, 040-roadmap-proposed, postfreeze-ok, security, 040-deferred-20190220 new enhancement Medium
#28511 Limit the number of open testing circuits, and the total number of testing circuits fast-fix, tor-bwauth, tor-dos, 035-backport, 029-backport, 041-proposed, needs-proposal, 033-unreached-backport new defect Medium
#28514 Open NUM_PARALLEL_TESTING_CIRCS when a bandwidth test is initiated tor-dos, tor-bwauth, 035-backport, 029-backport-maybe-not, needs-proposal, 034-unreached-backport-maybe, 033-unreached-backport-maybe new defect Medium
#29999 Objective 1, Activity 2: Denial of service defences tor-hs, tor-dos, network-team-roadmap-2019-Q1Q2, user-feedback, blog new project Medium
#30221 HS performance optimizations of codebase (master ticket) tor-dos tor-hs refactoring new defect Medium
#30291 Optimize our path selection code tor-performance tor-hs path-selection refactoring tor-dos new enhancement Medium
#30466 hs: Do not allow more than one control cell on a circuit tor-dos, tor-hs, tor-relay needs_information neel defect Medium
#30601 Please add link to HackerOne bug bounty portal to contacts for security issues doschackathon new hiro enhancement Medium
#31223 Research approaches for improving the availability of services under DoS tor-hs tor-dos new defect Medium
#31754 Add HS DoS defence stats to heartbeat tor-hs, tor-dos, network-team-roadmap-2019-Q1Q2, user-feedback, blog, easy new defect Medium
#469 please limit connections by client tor-relay, tor-dos needs_revision defect Low
#925 Tor fails badly when accept(2) returns EMFILE or ENFILE tor-relay, oos, sponsor8-maybe, tor-dos new defect Low
#18647 When low on BW, limit the total fraction used to answer directory requests tor-dos tor-relay bandwidth priority new enhancement Low
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