{
    "id": "CVE-2013-4123",
    "published": "2013-09-16 19:14:38",
    "last_modified": "2026-06-16 23:56:40",
    "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": "CWE-20",
    "description": "client_side_request.cc in Squid 3.2.x before 3.2.13 and 3.3.x before 3.3.8 allows remote attackers to cause a denial of service via a crafted port number in a HTTP Host header.",
    "epss_score": "0.80451",
    "epss_percentile": "0.99613",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:18:54",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "opensuse",
            "product": "opensuse"
        },
        {
            "vendor": "squid-cache",
            "product": "squid"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "26886",
            "title": "Squid 3.3.5 - Denial of Service (PoC)",
            "date": "2013-07-16",
            "url": "https://www.exploit-db.com/exploits/26886"
        }
    ],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-updates/2013-09/msg00024.html",
        "http://secunia.com/advisories/54142",
        "http://secunia.com/advisories/54834",
        "http://www.squid-cache.org/Advisories/SQUID-2013_3.txt",
        "http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11826.patch",
        "http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12591.patch",
        "http://lists.opensuse.org/opensuse-updates/2013-09/msg00024.html",
        "http://secunia.com/advisories/54142",
        "http://secunia.com/advisories/54834",
        "http://www.squid-cache.org/Advisories/SQUID-2013_3.txt",
        "http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11826.patch",
        "http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12591.patch"
    ]
}