CVE-2019-19331

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2019-19331", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "dateUpdated": "2024-08-05T02:16:46.880Z", "dateReserved": "2019-11-27T00:00:00.000Z", "datePublished": "2019-12-16T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2024-04-26T07:06:04.638Z"}, "descriptions": [{"lang": "en", "value": "knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB)."}], "affected": [{"vendor": "CZ.NIC", "product": "knot-resolver", "versions": [{"version": "4.3.0", "status": "affected"}]}], "references": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331"}, {"url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html"}, {"name": "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"}], "metrics": [{"cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-407", "cweId": "CWE-407"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T02:16:46.880Z"}, "title": "CVE Program Container", "references": [{"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331", "tags": ["x_transferred"]}, {"url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html", "tags": ["x_transferred"]}, {"name": "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"}]}]}}

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{"affected": [{"affectedData": [{"product": "knot-resolver", "vendor": "CZ.NIC", "versions": [{"status": "affected", "version": "4.3.0"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*", "matchCriteriaId": "08F4F074-C1C5-4360-BDB3-8248023C2FBB", "versionEndExcluding": "4.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB)."}, {"lang": "es", "value": "knot-resolver versiones anteriores a 4.3.0, es vulnerable a una denegaci\u00f3n de servicio por medio de una alta utilizaci\u00f3n de la CPU. Las respuestas de DNS con muchos registros de recursos podr\u00edan ser procesadas de manera muy ineficiente, en casos extremos, tomar incluso varios segundos de CPU para cada mensaje no almacenado en cach\u00e9. Por ejemplo, algunos miles de registros A pueden ser agrupados en un mensaje DNS (el l\u00edmite es 64kB)."}], "id": "CVE-2019-19331", "lastModified": "2026-06-17T02:26:30.960", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-12-16T16:15:11.660", "references": [{"source": "secalert@redhat.com", "tags": ["Exploit", "Issue Tracking", "Patch"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331"}, {"source": "secalert@redhat.com", "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"}, {"source": "secalert@redhat.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Patch"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-404"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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