{
    "id": "CVE-2009-2477",
    "published": "2009-07-15 15:30:01",
    "last_modified": "2026-06-16 23:09:32",
    "cvss_score": "9.3",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
    "cwe": "CWE-94",
    "description": "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.",
    "epss_score": "0.42689",
    "epss_percentile": "0.98670",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:08",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "mozilla",
            "product": "firefox"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "40936",
            "title": "Naenara Browser 3.5 (RedStar 3.0 Desktop) - 'JACKRABBIT' Client-Side Command Execution",
            "date": "2016-12-18",
            "url": "https://www.exploit-db.com/exploits/40936"
        },
        {
            "source": "exploit-db",
            "ref_id": "16299",
            "title": "Mozilla Firefox 3.5 - 'escape()' Return Value Memory Corruption (Metasploit)",
            "date": "2010-09-20",
            "url": "https://www.exploit-db.com/exploits/16299"
        },
        {
            "source": "exploit-db",
            "ref_id": "9214",
            "title": "Mozilla Firefox 3.5 - 'Font tags' Remote HeapSpray (2)",
            "date": "2009-07-20",
            "url": "https://www.exploit-db.com/exploits/9214"
        },
        {
            "source": "exploit-db",
            "ref_id": "9137",
            "title": "Mozilla Firefox 3.5 - Font tags Remote Buffer Overflow",
            "date": "2009-07-13",
            "url": "https://www.exploit-db.com/exploits/9137"
        }
    ],
    "refs_list": [
        "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",
        "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",
        "http://www.mozilla.org/security/announce/2009/mfsa2009-41.html",
        "http://www.securityfocus.com/bid/35660",
        "http://www.vupen.com/english/advisories/2009/1868",
        "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",
        "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",
        "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",
        "http://www.mozilla.org/security/announce/2009/mfsa2009-41.html"
    ]
}