[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3878: Potential denial of service attack by rogue servers

[Tahoe-LAFS]

#3878: Potential denial of service attack by rogue servers
----------------------+---------------------------
 Reporter:  itamarst  |          Owner:
     Type:  defect    |         Status:  new
 Priority:  normal    |      Milestone:  undecided
Component:  unknown   |        Version:  n/a
 Keywords:            |  Launchpad Bug:
----------------------+---------------------------
 * Malicious server SN joins grid G
 * Client C begins to upload shares R[1..N] to storage servers S[1..N]
 * SN sees upload of share RN to storage index I
 * SN immediately calls allocate_buckets on S[1..N-1] for shares R[1..N]
 (but doesn't bother to upload anything)
 * For any server/share combination where SN gets there first, C is denied
 the ability to perform an upload. Also, to C, it looks like the share has
 already been uploaded so no further work is required on its part.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3878>
Tahoe-LAFS <https://Tahoe-LAFS.org>
secure decentralized storage