{
    "id": "CVE-2018-16657",
    "published": "2018-09-07 14:29:03",
    "last_modified": "2026-06-17 01:44:37",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-476",
    "description": "In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with an invalid Via header causes a segmentation fault and crashes Kamailio. The reason is missing input validation in the crcitt_string_array core function for calculating a CRC hash for To tags. (An additional error is present in the check_via_address core function: this function also misses input validation.) This could result in denial of service and potentially the execution of arbitrary code.",
    "epss_score": "0.03581",
    "epss_percentile": "0.89110",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-09 18:17:20",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "kamailio",
            "product": "kamailio"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://lists.debian.org/debian-lts-announce/2018/09/msg00013.html",
        "https://skalatan.de/blog/advisory-hw-2018-06",
        "https://www.debian.org/security/2018/dsa-4292",
        "https://lists.debian.org/debian-lts-announce/2018/09/msg00013.html",
        "https://skalatan.de/blog/advisory-hw-2018-06",
        "https://www.debian.org/security/2018/dsa-4292"
    ]
}