{
    "id": "CVE-2019-3842",
    "published": "2019-04-09 21:29:03",
    "last_modified": "2026-06-17 02:35:42",
    "cvss_score": "7.0",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-285",
    "description": "In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the \"allow_active\" element rather than \"allow_any\".",
    "epss_score": "0.01207",
    "epss_percentile": "0.67521",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-11 18:17:21",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "redhat",
            "product": "enterprise_linux"
        },
        {
            "vendor": "systemd_project",
            "product": "systemd"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "46743",
            "title": "systemd - Lack of Seat Verification in PAM Module Permits Spoofing Active Session to polkit",
            "date": "2019-04-23",
            "url": "https://www.exploit-db.com/exploits/46743"
        }
    ],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html",
        "http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842",
        "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STR36RJE4ZZIORMDXRERVBHMPRNRTHAC/",
        "https://www.exploit-db.com/exploits/46743/",
        "http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html",
        "http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842",
        "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E",
        "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STR36RJE4ZZIORMDXRERVBHMPRNRTHAC/",
        "https://www.exploit-db.com/exploits/46743/"
    ]
}