CVE-2009-2479

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 12.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-07-16 · updated 2026-06-16
Weakness: CWE-119

Description

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.

Affected products

Mozilla Firefox: 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6 (+13)

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/

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