CVE-2011-1924: Tor

Medium severity, CVSS 5.0. EPSS: 2.8% chance of exploitation in the next 30 days.

Buffer overflow in the policy_summarize function in or/policies.c in Tor before 0.2.1.30 allows remote attackers to cause a denial of service (directory authority crash) via a crafted policy that triggers creation of a long port list.

Affected products

• Tor Tor: up to and including 0.2.1.29; version 0.0.2 only; version 0.0.2_pre13 only; version 0.0.2_pre14 only; version 0.0.2_pre15 only; version 0.0.2_pre16 only; …

Published 2011-06-14. Last modified 2026-06-16.