CVE-2009-0353

CVE-2009-0353 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

• Severity: Critical (CVSS 2.0 base score 10.0)
• EPSS exploit prediction: 4% (90th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Mozilla Firefox
• Published: 2009-02-04
• Last modified: 2026-06-16

Description

Unspecified vulnerability in Mozilla Firefox 3.x before 3.0.6, Thunderbird before 2.0.0.21, and SeaMonkey before 1.1.15 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to the JavaScript engine.

Frequently asked questions

What is CVE-2009-0353?

Unspecified vulnerability in Mozilla Firefox 3.x before 3.0.6, Thunderbird before 2.0.0.21, and SeaMonkey before 1.1.15 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to the JavaScript engine.

How severe is CVE-2009-0353?

CVE-2009-0353 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-0353 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0353?

CVE-2009-0353 primarily affects Mozilla Firefox. In total, 70 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0353?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2009-0353 published?

CVE-2009-0353 was published on 2009-02-04 and last updated on 2026-06-16.

References

• http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00009.html
• http://rhn.redhat.com/errata/RHSA-2009-0256.html
• http://secunia.com/advisories/33799
• http://secunia.com/advisories/33802
• http://secunia.com/advisories/33808
• http://secunia.com/advisories/33809
• http://secunia.com/advisories/33816
• http://secunia.com/advisories/33831
• http://secunia.com/advisories/33841
• http://secunia.com/advisories/33846
• http://secunia.com/advisories/33869
• http://secunia.com/advisories/34324
• http://secunia.com/advisories/34417
• http://secunia.com/advisories/34462
• http://secunia.com/advisories/34464
• http://secunia.com/advisories/34527
• http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.405420
• http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.433952
• http://support.avaya.com/elmodocs2/security/ASA-2009-040.htm
• http://www.debian.org/security/2009/dsa-1830
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:044
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:083
• http://www.mozilla.org/security/announce/2009/mfsa2009-01.html
• http://www.redhat.com/support/errata/RHSA-2009-0257.html
• http://www.redhat.com/support/errata/RHSA-2009-0258.html
• http://www.securityfocus.com/bid/33598
• http://www.securitytracker.com/id?1021663
• http://www.ubuntu.com/usn/usn-717-1
• http://www.vupen.com/english/advisories/2009/0313

Affected products (70)

• cpe:2.3:a:mozilla:firefox:3.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.0.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1:alpha:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1:beta:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.8:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.10:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.11:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:1.1.12:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.5:beta:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:1.0.6:*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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• CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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