Paul Syverson

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.1.1.20 **Description** The issue allows remote attackers to identify hidden services by attempting a large number of accesses of the hidden service through a malicious Tor server, eventually causing a circuit to be built through the malicious server. **Recommendations** For versions prior to 0.1.1.20, update to version 0.1.1.20 or later to resolve the issue.