{
    "id": "CVE-2011-5009",
    "published": "2011-12-25 01:55:04",
    "last_modified": "2026-06-16 23:35:46",
    "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": null,
    "description": "The CmpWebServer.dll module in the Control service in 3S CoDeSys 3.4 SP4 Patch 2 allows remote attackers to cause a denial of service (NULL pointer dereference) via (1) a crafted Content-Length in an HTTP POST or (2) an invalid HTTP request method.",
    "epss_score": "0.10395",
    "epss_percentile": "0.95580",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:10",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "3ssoftware",
            "product": "codesys"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "36377",
            "title": "CoDeSys 3.4 - POST Null Pointer Content-Length Parsing Remote Denial of Service",
            "date": "2011-11-30",
            "url": "https://www.exploit-db.com/exploits/36377"
        },
        {
            "source": "exploit-db",
            "ref_id": "36378",
            "title": "CoDeSys 3.4 - Null Pointer Invalid HTTP Request Parsing Remote Denial of Service",
            "date": "2011-11-30",
            "url": "https://www.exploit-db.com/exploits/36378"
        }
    ],
    "refs_list": [
        "http://aluigi.altervista.org/adv/codesys_1-adv.txt",
        "http://seclists.org/bugtraq/2011/Nov/178",
        "http://secunia.com/advisories/47018",
        "http://www.osvdb.org/77388",
        "http://www.osvdb.org/77389",
        "http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/71533",
        "http://aluigi.altervista.org/adv/codesys_1-adv.txt",
        "http://seclists.org/bugtraq/2011/Nov/178",
        "http://secunia.com/advisories/47018",
        "http://www.osvdb.org/77388",
        "http://www.osvdb.org/77389",
        "http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-336-01A.pdf",
        "https://exchange.xforce.ibmcloud.com/vulnerabilities/71533"
    ]
}