FKIE_CVE-2023-4236

Vulnerability from fkie_nvd - Published: 2023-09-20 13:15 - Updated: 2026-06-17 06:37
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.
References
security-officer@isc.orghttp://www.openwall.com/lists/oss-security/2023/09/20/2Mailing List, Third Party Advisory
security-officer@isc.orghttps://kb.isc.org/docs/cve-2023-4236Vendor Advisory
security-officer@isc.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/Mailing List
security-officer@isc.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/Mailing List
security-officer@isc.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/Mailing List, Third Party Advisory
security-officer@isc.orghttps://security.netapp.com/advisory/ntap-20231013-0004/Third Party Advisory
security-officer@isc.orghttps://www.debian.org/security/2023/dsa-5504Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/09/20/2Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://kb.isc.org/docs/cve-2023-4236Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/Mailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231013-0004/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2023/dsa-5504Third Party Advisory
Impacted products
Vendor Product Version
isc bind *
isc bind 9.18.11
isc bind 9.18.18
fedoraproject fedora 37
fedoraproject fedora 38
fedoraproject fedora 39
debian debian_linux 10.0
debian debian_linux 11.0
netapp h300s_firmware -
netapp h300s -
netapp h500s_firmware -
netapp h500s -
netapp h700s_firmware -
netapp h700s -
netapp h410s_firmware -
netapp h410s -
netapp h410c_firmware -
netapp h410c -
To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load.\nThis issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1."
    },
    {
      "lang": "es",
      "value": "Una falla en el c\u00f3digo de red que maneja consultas DNS sobre TLS puede causar que \"named\" finalice inesperadamente debido a una falla de aserci\u00f3n. Esto sucede cuando las estructuras de datos internas se reutilizan incorrectamente bajo una carga significativa de consultas DNS sobre TLS. Este problema afecta a las versiones 9.18.0 a 9.18.18 y 9.18.11-S1 a 9.18.18-S1 de BIND 9."
    }
  ],
  "id": "CVE-2023-4236",
  "lastModified": "2026-06-17T06:37:22.810",
  "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"
      }
    ]
  },
  "published": "2023-09-20T13:15:12.313",
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  "sourceIdentifier": "security-officer@isc.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-617"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.