{
    "id": "CVE-2004-1109",
    "published": "2005-01-10 05:00:00",
    "last_modified": "2026-06-16 22:07:02",
    "cvss_score": "5.0",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
    "cwe": null,
    "description": "The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to cause a denial of service (CPU consumption and system freeze from infinite loop) via a (1) TCP, (2) UDP, or (3) ICMP packet with a zero length IP Option field.",
    "epss_score": "0.03236",
    "epss_percentile": "0.87860",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-05 18:17:03",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "kerio",
            "product": "personal_firewall"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "626",
            "title": "Kerio Personal Firewall 4.1.1 - Multiple IP Options Denial of Service Vulnerabilities",
            "date": "2004-11-12",
            "url": "https://www.exploit-db.com/exploits/626"
        }
    ],
    "refs_list": [
        "http://www.eeye.com/html/research/advisories/AD20041109.html",
        "http://www.kerio.com/security_advisory.html",
        "http://www.securityfocus.com/bid/11639",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/17992",
        "http://www.eeye.com/html/research/advisories/AD20041109.html",
        "http://www.kerio.com/security_advisory.html",
        "http://www.securityfocus.com/bid/11639",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/17992"
    ]
}