{
    "id": "CVE-2001-0183",
    "published": "2001-03-26 05:00:00",
    "last_modified": "2026-06-16 21:53:49",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
    "cwe": null,
    "description": "ipfw and ip6fw in FreeBSD 4.2 and earlier allows remote attackers to bypass access restrictions by setting the ECE flag in a TCP packet, which makes the packet appear to be part of an established connection.",
    "epss_score": "0.08094",
    "epss_percentile": "0.94660",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-04 18:17:03",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "freebsd",
            "product": "freebsd"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "20593",
            "title": "FreeBSD 3.x/4.x - 'ipfw' Filtering Evasion",
            "date": "2001-01-23",
            "url": "https://www.exploit-db.com/exploits/20593"
        }
    ],
    "refs_list": [
        "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:08.ipfw.asc",
        "http://www.ciac.org/ciac/bulletins/l-029.shtml",
        "http://www.osvdb.org/1743",
        "http://www.security-express.com/archives/bugtraq/2001-01/0424.html",
        "http://www.securityfocus.com/bid/2293",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/5998",
        "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-01:08.ipfw.asc",
        "http://www.ciac.org/ciac/bulletins/l-029.shtml",
        "http://www.osvdb.org/1743",
        "http://www.security-express.com/archives/bugtraq/2001-01/0424.html",
        "http://www.securityfocus.com/bid/2293",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/5998"
    ]
}