CVE-2009-0653: OpenSSL

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

OpenSSL, probably 0.9.6, does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack, a related issue to CVE-2002-0970.

Affected products

• OpenSSL OpenSSL: version 0.9.6 only

Published 2009-02-20. Last modified 2026-06-16.