Vulnerability-Lookup

GSD-2023-4236

Vulnerability from gsd - Updated: 2023-12-13 01:20

Details

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.

Aliases

CVE-2023-4236

Aliases

CVE-2023-4236

JSON

To clipboard

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  "GSD": {
    "alias": "CVE-2023-4236",
    "id": "GSD-2023-4236"
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}

CVE-2023-4236 (GCVE-0-2023-4236)

Vulnerability from cvelistv5 – Published: 2023-09-20 12:32 – Updated: 2025-02-13 17:09

Title

named may terminate unexpectedly under high DNS-over-TLS query load

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Assigner

isc mitre root

References

7 references

URL	Tags
https://kb.isc.org/docs/cve-2023-4236	vendor-advisory
http://www.openwall.com/lists/oss-security/2023/09/20/2
https://www.debian.org/security/2023/dsa-5504
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://security.netapp.com/advisory/ntap-2023101…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

1 product

Vendor	Product	Version
ISC	BIND 9	Affected: 9.18.0 , ≤ 9.18.18 (custom) Affected: 9.18.11-S1 , ≤ 9.18.18-S1 (custom)

Date Public

2023-09-20 00:00

Credits

ISC would like to thank Robert Story from the USC/ISI DNS root server operations team for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20231013-0004/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.19 or 9.18.19-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "named may terminate unexpectedly under high DNS-over-TLS query load",
      "workarounds": [
        {
          "lang": "en",
          "value": "Disabling listening for DNS-over-TLS connections (by removing `listen-on ... tls ... { ... };` statements from the configuration) prevents the affected code paths from being taken, rendering exploitation impossible. However, there is no workaround for this flaw if DNS-over-TLS support is required."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2023-4236",
    "datePublished": "2023-09-20T12:32:16.631Z",
    "dateReserved": "2023-08-08T10:23:50.680Z",
    "dateUpdated": "2025-02-13T17:09:18.327Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

GSD-2023-4236

CVE-2023-4236 (GCVE-0-2023-4236)

Tags

Sightings

Nomenclature

Related by attack behaviour