CVE-2011-4894: Tor

Medium severity, CVSS 4.3. EPSS: 1.5% chance of exploitation in the next 30 days.

Tor before 0.2.2.34, when configured as a bridge, uses direct DirPort access instead of a Tor TLS connection for a directory fetch, which makes it easier for remote attackers to enumerate bridges by observing DirPort connections.

Affected products

• Tor Tor: up to and including 0.2.2.33; version 0.0.2 only; version 0.0.3 only; version 0.0.4 only; version 0.0.5 only; version 0.0.6 only; …

Published 2011-12-23. Last modified 2026-06-16.