CVE-2019-19331 (GCVE-0-2019-19331)

Vulnerability from cvelistv5 – Published: 2019-12-16 00:00 – Updated: 2024-08-05 02:16
VLAI?
Summary
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).
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
CZ.NIC knot-resolver Affected: 4.3.0
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        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:16:46.880Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19331"
          },
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            ],
            "url": "https://www.knot-resolver.cz/2019-12-04-knot-resolver-4.3.0.html"
          },
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            "name": "[debian-lts-announce] 20240426 [SECURITY] [DLA 3795-1] knot-resolver security update",
            "tags": [
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            "url": "https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html"
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          "vendor": "CZ.NIC",
          "versions": [
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              "version": "4.3.0"
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          "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)."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "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"
          }
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      ],
      "problemTypes": [
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          "descriptions": [
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          "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": [
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  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2019-19331",
    "datePublished": "2019-12-16T00:00:00.000Z",
    "dateReserved": "2019-11-27T00:00:00.000Z",
    "dateUpdated": "2024-08-05T02:16:46.880Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.