CVE-2013-6449: OpenSSL

Medium severity, CVSS 4.3. EPSS: 21.2% chance of exploitation in the next 30 days.

The ssl_get_algorithm2 function in ssl/s3_lib.c in OpenSSL before 1.0.2 obtains a certain version number from an incorrect data structure, which allows remote attackers to cause a denial of service (daemon crash) via crafted traffic from a TLS 1.2 client.

Affected products

• OpenSSL OpenSSL: up to and including 1.0.1e; version 1.0.0 only; version 1.0.0a only; version 1.0.0b only; version 1.0.0c only; version 1.0.0d only; …

Published 2013-12-23. Last modified 2026-06-17.