CVE-2008-2420: The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL),...

Security readout for executives and security teams

Stunnel versions before 4.24 could accept a certificate that had already been revoked. If an organization used stunnel client certificates for access control, a removed user or system might still be trusted. Exposure is most likely where stunnel before 4.24 is deployed with certificate-based access control and revocation checking expected to block revoked certificates. Treat as a targeted remediation item for legacy stunnel deployments, especially systems using client certificates to gate sensitive access. It is not marked actively exploited in the provided sources. Mitigation focus: Upgrade stunnel to 4.24 or later, following vendor package guidance.; Review Fedora, Mandriva, Gentoo, or platform-specific advisories for supported package versions.; Identify services relying on stunnel client certificates for access control..

Prepared

Jun 28, 2026, 19:09 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.