Ineffective Replay-Cache Protection for v2 Onion Services

CVE-2017-8819 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

In Tor before 0.2.5.16, 0.2.6 through 0.2.8 before 0.2.8.17, 0.2.9 before 0.2.9.14, 0.3.0 before 0.3.0.13, and 0.3.1 before 0.3.1.9, the replay-cache protection mechanism is ineffective for v2 onion services, aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue.

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