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    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 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.

    Published:Jul 14, 2009
    Last Modified:Apr 23, 2026
    EPS:Jul 16, 2009
    EPSS Score:0.11193
    CVSS Score:7.8

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox

    Exploits

    http://www.securityfocus.com/bid/35707http://www.securityfocus.com/bid/35707https://www.exploit-db.com/exploits/9158

    Related CVEs

    CVE-2026-84144 (CVSS 7.5) — Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence…
    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…
    CVE-2026-84139 (CVSS 6.1) — Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.…
    CVE-2026-84138 (CVSS 6.5) — Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155…
    CVE-2026-84137 (CVSS 4.3) — Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153…
    CVE-2026-84136 (CVSS 6.1) — Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, …
    CVE-2026-84135 (CVSS 9.8) — Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High