{
    "id": "CVE-2018-6794",
    "published": "2018-02-07 05:29:00",
    "last_modified": "2026-06-17 02:02:17",
    "cvss_score": "5.3",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
    "cwe": "CWE-693",
    "description": "Suricata before 4.0.4 is prone to an HTTP detection bypass vulnerability in detect.c and stream-tcp.c. If a malicious server breaks a normal TCP flow and sends data before the 3-way handshake is complete, then the data sent by the malicious server will be accepted by web clients such as a web browser or Linux CLI utilities, but ignored by Suricata IDS signatures. This mostly affects IDS signatures for the HTTP protocol and TCP stream content; signatures for TCP packets will inspect such network traffic as usual.",
    "epss_score": "0.24289",
    "epss_percentile": "0.97790",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:21",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "suricata-ids",
            "product": "suricata"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "44247",
            "title": "Suricata < 4.0.4 - IDS Detection Bypass",
            "date": "2018-03-05",
            "url": "https://www.exploit-db.com/exploits/44247"
        }
    ],
    "refs_list": [
        "https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1",
        "https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html",
        "https://redmine.openinfosecfoundation.org/issues/2427",
        "https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/",
        "https://www.exploit-db.com/exploits/44247/",
        "https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1",
        "https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html",
        "https://redmine.openinfosecfoundation.org/issues/2427",
        "https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/",
        "https://www.exploit-db.com/exploits/44247/"
    ]
}