CVE-2011-1473: OpenSSL

Medium severity, CVSS 5.0. EPSS: 67.2% chance of exploitation in the next 30 days.

OpenSSL before 0.9.8l, and 0.9.8m through 1.x, does not properly restrict client-initiated renegotiation within the SSL and TLS protocols, which might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection, a different vulnerability than CVE-2011-5094. NOTE: it can also be argued that it is the responsibility of server deployments, not a security library, to prevent or limit renegotiation when it is inappropriate within a specific environment

Affected products

• OpenSSL OpenSSL: version 0.9.8m only; version 0.9.8n only; version 0.9.8o only; version 0.9.8p only; version 0.9.8r only; version 0.9.8s only; …

Published 2012-06-16. Last modified 2026-06-16.