CVE-2009-2479: n/a vulnerability

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 (unca...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 05:52 UTC (UTC+00:00)

Security readout for executives and security teams

This 2009 Firefox issue can crash affected Windows Firefox versions when a page supplies an overly long Unicode string to a browser write method. The public record describes denial of service, not confirmed code execution. Business urgency is low unless legacy Firefox is still used in kiosks, VDI, or locked-down operational workflows. Exposure is likely limited to environments still running very old Firefox versions on Windows. Linux and Mac OS X crash behavior is noted, but the CVE description says that crash reportedly occurs in an operating-system library, not Firefox. Treat this as low priority for modern fleets, but close it quickly if legacy browsers remain in operational environments. The main risk is user disruption from browser crashes, not confirmed system compromise. Mitigation focus: Identify and remove Firefox 3.0.x, 3.5, and 3.5.1 on Windows.; Upgrade legacy Firefox to a vendor-supported release after checking Mozilla guidance.; Review Fedora or distribution advisories if Firefox was installed through OS packages..

Prepared: Jun 28, 2026, 10:26 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 16, 2009, 15:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=504342CVE reference · x_refsource_CONFIRM
FEDORA-2009-7898CVE reference · vendor-advisory, x_refsource_FEDORA
https://bugzilla.mozilla.org/show_bug.cgi?id=504343CVE reference · x_refsource_MISC
firefox-unicode-data-dos(51729)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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