CVE-2025-11232

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Kea", "vendor": "ISC", "versions": [{"lessThanOrEqual": "3.0.1", "status": "affected", "version": "3.0.1", "versionType": "custom"}, {"lessThanOrEqual": "3.1.2", "status": "affected", "version": "3.1.1", "versionType": "custom"}, {"lessThanOrEqual": "2.6.4", "status": "unaffected", "version": "2.6.0", "versionType": "custom"}, {"lessThanOrEqual": "2.7.9", "status": "unaffected", "version": "2.7.0", "versionType": "custom"}, {"lessThanOrEqual": "3.0.0", "status": "unaffected", "version": "3.0.0", "versionType": "custom"}, {"lessThanOrEqual": "3.1.0", "status": "unaffected", "version": "3.1.0", "versionType": "custom"}]}], "source": "security-officer@isc.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "To trigger the issue, three configuration parameters must have specific settings: \"hostname-char-set\" must be left at the default setting, which is \"[^A-Za-z0-9.-]\"; \"hostname-char-replacement\" must be empty (the default); and \"ddns-qualifying-suffix\" must *NOT* be empty (the default is empty). DDNS updates do not need to be enabled for this issue to manifest. A client that sends certain option content would then cause kea-dhcp4 to exit unexpectedly.\nThis issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2."}, {"lang": "es", "value": "Para desencadenar el problema, tres par\u00e1metros de configuraci\u00f3n deben tener ajustes espec\u00edficos: 'hostname-char-set' debe dejarse en la configuraci\u00f3n predeterminada, que es '[^A-Za-z0-9.-]'; 'hostname-char-replacement' debe estar vac\u00edo (el valor predeterminado); y 'ddns-qualifying-suffix' NO debe estar vac\u00edo (el valor predeterminado es vac\u00edo). Las actualizaciones DDNS no necesitan estar habilitadas para que este problema se manifieste. Un cliente que env\u00eda cierto contenido de opci\u00f3n provocar\u00eda entonces que kea-dhcp4 se cierre inesperadamente. Este problema afecta a las versiones de Kea 3.0.1 a 3.0.1 y 3.1.1 a 3.1.2."}], "id": "CVE-2025-11232", "lastModified": "2026-10-08T11:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-officer@isc.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-11232", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-29T18:22:07.119804Z", "version": "2.0.3"}}]}, "published": "2025-10-29T18:15:40.197", "references": [{"source": "security-officer@isc.org", "url": "https://kb.isc.org/docs/cve-2025-11232"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2025/10/29/5"}], "sourceIdentifier": "security-officer@isc.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-823"}], "source": "security-officer@isc.org", "type": "Secondary"}]}

{"bugzilla": {"description": "kea: Invalid characters cause assert", "id": "2407178", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2407178"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-823", "details": ["A flaw was found in Kea. A remote attacker can send specific option content to the kea-dhcp4 server. When the server is configured with specific parameters, an assertion failure can be triggered and cause the kea-dhcp4 process to exit unexpectedly, resulting in a denial of service."], "mitigation": {"lang": "en:us", "value": "Set the \"hostname-char-replacement\" parameter to any non-empty value (the default is empty). For example, setting it to \"x\" is an effective workaround, regardless of other settings.\n~~~\n...\n\"hostname-char-replacement\": \"x\",\n...\n~~~"}, "name": "CVE-2025-11232", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kea", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2025-10-29T18:02:39Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-11232\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-11232\nhttps://kb.isc.org/docs/cve-2025-11232"], "statement": "To exploit this issue, three configuration parameters must have the following settings:\n- hostname-char-set: must have the default setting, which is \"[^A-Za-z0-9.-]\".\n- hostname-char-replacement: must be empty, which is the default value.\n- ddns-qualifying-suffix: must NOT be empty, which is not the default.\nA remote and unauthenticated attacker can cause the kea-dhcp4 process to exit unexpectedly by sending specific option content, preventing all DHCP clients it servers from obtaining new leases or renewing existing ones until the service is restarted. Due to this reason, this flaw has been rated with an important severity.", "threat_severity": "Important"}

{"created": "2025-10-30T14:37:49.591013+00:00", "updated": "2025-10-30T14:37:49.591036+00:00", "vendors": ["isc", "isc$PRODUCT$kea"]}