Circuit Persistence Vulnerability in Tor Versions 0.2.4.23 and 0.2.5.6-alpha

CVE-2014-5117 · MEDIUM Severity

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

Tor before 0.2.4.23 and 0.2.5 before 0.2.5.6-alpha maintains a circuit after an inbound RELAY_EARLY cell is received by a client, which makes it easier for remote attackers to conduct traffic-confirmation attacks by using the pattern of RELAY and RELAY_EARLY cells as a means of communicating information about hidden service names.

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