CVE-2008-2420

The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation...

6.8 MediumFix available

The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL), which allows remote attackers to bypass intended access restrictions by using revoked certificates.

Exploit likelihood

1.36%Down 0.8 points since Feb 4, 2022

What each source reports

NVD Score used 6.8

Record: CVE-2008-2420
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-264
Updated: 2026-11-02

CVE List No score

Record: CVE-2008-2420
Updated: 2026-11-02

EUVDEUVD-2008-2415 No score

Record: EUVD-2008-2415
Updated: 2026-11-03

GitHub AdvisoriesGHSA-7266-wh6x-6jjw No score

The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation...

Record: GHSA-7266-wh6x-6jjw
Updated: 2026-11-02

OSV No score

Record: CVE-2008-2420
Updated: 2026-11-02

OSVDEBIAN-CVE-2008-2420 No score

Record: DEBIAN-CVE-2008-2420
Updated: 2026-11-02

Affected products

stunnel

Affected packages

Affected packages
Package	Affected	Fixed
`stunnel4` Debian:12	before 3:4.22-1.1	3:4.22-1.1
`stunnel4` Debian:13	before 3:4.22-1.1	3:4.22-1.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2008-2420 is a medium vulnerability (CVSS 6.8) in Stunnel, published May 23, 2008. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.36%, the 71st percentile. Fixed in stunnel4 3:4.22-1.1.

References

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