{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40779",
        "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "state": "PUBLISHED",
        "assignerShortName": "isc",
        "dateReserved": "2025-04-16T08:44:49.857Z",
        "datePublished": "2025-08-27T20:23:29.489Z",
        "dateUpdated": "2025-11-04T21:10:15.428Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
                "shortName": "isc",
                "dateUpdated": "2025-08-27T20:23:29.489Z"
            },
            "title": "Kea crash upon interaction between specific client options and subnet selection",
            "datePublic": "2025-08-27T00:00:00.000Z",
            "affected": [
                {
                    "vendor": "ISC",
                    "product": "Kea",
                    "versions": [
                        {
                            "version": "2.7.1",
                            "lessThanOrEqual": "2.7.9",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "3.0.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0",
                            "status": "affected"
                        },
                        {
                            "version": "2.6.0",
                            "lessThanOrEqual": "2.6.4",
                            "status": "unaffected",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "type": "CWE",
                            "cweId": "CWE-476",
                            "description": "CWE-476 NULL Pointer Dereference"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the `kea-dhcp4` process will abort with an assertion failure.  This happens only if the client request is unicast directly to Kea; broadcast messages do not cause the problem.\nThis issue affects Kea versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0."
                }
            ],
            "impacts": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "Denial of service.  A malicious or misconfigured DHCP client can crash the Kea DHCPv4 service by sending a single packet."
                        }
                    ]
                }
            ],
            "workarounds": [
                {
                    "lang": "en",
                    "value": "No workarounds known."
                }
            ],
            "exploits": [
                {
                    "lang": "en",
                    "value": "We are not aware of any active exploits."
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Upgrade to the patched release most closely related to your current version of Kea: 3.0.1 or 3.1.1."
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "ISC would like to thank the following for bringing this vulnerability to our attention:\n\n* Jochen M.\n* Martin Dinev, Trading212\n* Ashwani Kumar, Post Graduate Institute of Medical Education & Research, Chandigarh, India\n* Bret Giddings, University of Essex\n* Florian Ritterhoff, Munich University of Applied Sciences"
                }
            ],
            "references": [
                {
                    "url": "https://kb.isc.org/docs/cve-2025-40779",
                    "name": "CVE-2025-40779",
                    "tags": [
                        "vendor-advisory"
                    ]
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-08-28T14:07:45.683079Z",
                                "id": "CVE-2025-40779",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-08-28T14:08:05.935Z"
                }
            },
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "http://www.openwall.com/lists/oss-security/2025/08/27/1"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2025-11-04T21:10:15.428Z"
                }
            }
        ]
    }
}