{
    "id": "CVE-2019-17455",
    "published": "2019-10-10 18:15:11",
    "last_modified": "2026-06-17 02:23:59",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-125",
    "description": "Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.",
    "epss_score": "0.03107",
    "epss_percentile": "0.87415",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-10 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": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "nongnu",
            "product": "libntlm"
        },
        {
            "vendor": "opensuse",
            "product": "backports_sle"
        },
        {
            "vendor": "opensuse",
            "product": "leap"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html",
        "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145",
        "https://gitlab.com/jas/libntlm/issues/2",
        "https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html",
        "https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/",
        "https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html",
        "https://security-tracker.debian.org/tracker/CVE-2019-17455",
        "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.html",
        "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.html",
        "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145",
        "https://gitlab.com/jas/libntlm/issues/2",
        "https://lists.debian.org/debian-lts-announce/2020/05/msg00010.html",
        "https://lists.debian.org/debian-lts-announce/2021/11/msg00026.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/",
        "https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.html",
        "https://security-tracker.debian.org/tracker/CVE-2019-17455"
    ]
}