CVE-2009-2477
HIGH · CVSS 9.3EPSS 42.5%EU EUVD
js/src/jstracer.cpp in the Just-in-time (JIT) JavaScript compiler (aka TraceMonkey) in Mozilla Firefox 3.5 before 3.5.1 allows remote attackers to execute arbitrary code via certain use of the escape function that triggers access to uninitialized memory locations, as originally demonstrated by a document containing P and FONT elements.
Key facts
- CVSS score
- 9.3 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C- Weakness (CWE)
- CWE-94
- EPSS score
- 42.5% (99th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-2472)
- Published
- July 15, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-2472 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- mozilla / firefox
References
- http://blog.mozilla.com/security/2009/07/14/critical-javascript-vulnerability-in-firefox-35/
- http://isc.sans.org/diary.html?storyid=6796
- http://secunia.com/advisories/35798(Vendor Advisory)
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-266148-1
- http://voices.washingtonpost.com/securityfix/2009/07/stopgap_fix_for_critical_firef.html
- http://www.exploit-db.com/exploits/9137
- http://www.exploit-db.com/exploits/9181
- http://www.h-online.com/security/First-Zero-Day-Exploit-for-Firefox-3-5--/news/113761
- http://www.kb.cert.org/vuls/id/443060(US Government Resource)
- http://www.mozilla.org/security/announce/2009/mfsa2009-41.html(Patch, Vendor Advisory)
- http://www.securityfocus.com/bid/35660(Exploit)
- http://www.vupen.com/english/advisories/2009/1868(Patch, Vendor Advisory)
- https://bugzilla.mozilla.org/show_bug.cgi?id=503286
- https://www.exploit-db.com/exploits/40936/
- https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00909.html
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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