CVE-2011-4897: Tor

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

Tor before 0.2.2.25-alpha, when configured as a relay without the Nickname configuration option, uses the local hostname as the Nickname value, which allows remote attackers to obtain potentially sensitive information by reading this value.

Affected products

• Tor Tor: up to and including 0.2.2.24; 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.