Vulnerability-Lookup

ubuntu-cve-2023-4236

Vulnerability from osv_ubuntu

Published

2023-09-20 00:00

Modified

2026-04-22 07:45

Summary

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.

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2023-4236	REPORT
	https://kb.isc.org/docs/cve-2023-4236	REPORT
	https://ubuntu.com/security/notices/USN-6390-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2023-4236	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.12-0ubuntu0.22.04.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.12-0ubuntu0.22.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.16.15-1ubuntu1",
        "1:9.16.15-1ubuntu2",
        "1:9.16.15-1ubuntu3",
        "1:9.18.0-2ubuntu1",
        "1:9.18.0-2ubuntu2",
        "1:9.18.0-2ubuntu3",
        "1:9.18.1-1ubuntu1",
        "1:9.18.1-1ubuntu1.1",
        "1:9.18.1-1ubuntu1.2",
        "1:9.18.1-1ubuntu1.3",
        "1:9.18.12-0ubuntu0.22.04.1",
        "1:9.18.12-0ubuntu0.22.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.18-0ubuntu2"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.18-0ubuntu2"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.18-0ubuntu2"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.18-0ubuntu2"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.18-0ubuntu2"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.18-0ubuntu2"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.18-0ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.18-0ubuntu2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.18-0ubuntu2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "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.",
  "id": "UBUNTU-CVE-2023-4236",
  "modified": "2026-04-22T07:45:06Z",
  "published": "2023-09-20T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-4236"
    },
    {
      "type": "REPORT",
      "url": "https://kb.isc.org/docs/cve-2023-4236"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6390-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-4236"
    }
  ],
  "related": [
    "USN-6390-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-4236"
  ]
}

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

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.

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

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

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T07:24:03.623Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "CVE-2023-4236",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://kb.isc.org/docs/cve-2023-4236"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2023/09/20/2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2023/dsa-5504"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IPJLLTJCSDJJII7IIZPLTBQNWP7MZH7F/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U35OARLQCPMVCBBPHWBXY5M6XJLD2TZ5/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20231013-0004/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "9.18.18",
              "status": "affected",
              "version": "9.18.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.18.18-S1",
              "status": "affected",
              "version": "9.18.11-S1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Robert Story from the USC/ISI DNS root server operations team for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2023-09-20T00:00:00.000Z",
      "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."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "A `named` instance vulnerable to this flaw may terminate unexpectedly when subjected to significant DNS-over-TLS query load.\n\nThis flaw does not affect DNS-over-HTTPS code, as that uses a different TLS implementation."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-11-03T20:06:12.271Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2023-4236",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2023-4236"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2023/09/20/2"
        },
        {
          "url": "https://www.debian.org/security/2023/dsa-5504"
        },
        {
          "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"
}

usn-6390-1

Vulnerability from osv_ubuntu

Published

2023-09-20 14:07

Modified

2026-04-22 07:37

Summary

bind9 vulnerabilities

Details

It was discovered that Bind incorrectly handled certain control channel messages. A remote attacker with access to the control channel could possibly use this issue to cause Bind to crash, resulting in a denial of service. (CVE-2023-3341)

Robert Story discovered that Bind incorrectly handled certain DNS-over-TLS queries. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-4236)

References

URL

Type

	https://ubuntu.com/security/notices/USN-6390-1	ADVISORY
	https://ubuntu.com/security/CVE-2023-3341	REPORT
	https://ubuntu.com/security/CVE-2023-4236	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-3341",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.16.1-0ubuntu2.16"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.16.1-0ubuntu2.16?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.16.1-0ubuntu2.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.11.5.P4+dfsg-5.1ubuntu2",
        "1:9.11.5.P4+dfsg-5.1ubuntu3",
        "1:9.11.5.P4+dfsg-5.1ubuntu4",
        "1:9.11.5.P4+dfsg-5.1ubuntu5",
        "1:9.11.14+dfsg-1ubuntu1",
        "1:9.11.14+dfsg-3ubuntu1",
        "1:9.16.0-1ubuntu3",
        "1:9.16.0-1ubuntu4",
        "1:9.16.0-1ubuntu5",
        "1:9.16.1-0ubuntu1",
        "1:9.16.1-0ubuntu2",
        "1:9.16.1-0ubuntu2.1",
        "1:9.16.1-0ubuntu2.2",
        "1:9.16.1-0ubuntu2.3",
        "1:9.16.1-0ubuntu2.4",
        "1:9.16.1-0ubuntu2.6",
        "1:9.16.1-0ubuntu2.7",
        "1:9.16.1-0ubuntu2.8",
        "1:9.16.1-0ubuntu2.9",
        "1:9.16.1-0ubuntu2.10",
        "1:9.16.1-0ubuntu2.11",
        "1:9.16.1-0ubuntu2.12",
        "1:9.16.1-0ubuntu2.14",
        "1:9.16.1-0ubuntu2.15"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-3341",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-4236",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.12-0ubuntu0.22.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.12-0ubuntu0.22.04.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.12-0ubuntu0.22.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.16.15-1ubuntu1",
        "1:9.16.15-1ubuntu2",
        "1:9.16.15-1ubuntu3",
        "1:9.18.0-2ubuntu1",
        "1:9.18.0-2ubuntu2",
        "1:9.18.0-2ubuntu3",
        "1:9.18.1-1ubuntu1",
        "1:9.18.1-1ubuntu1.1",
        "1:9.18.1-1ubuntu1.2",
        "1:9.18.1-1ubuntu1.3",
        "1:9.18.12-0ubuntu0.22.04.1",
        "1:9.18.12-0ubuntu0.22.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Bind incorrectly handled certain control channel\nmessages. A remote attacker with access to the control channel could\npossibly use this issue to cause Bind to crash, resulting in a denial of\nservice. (CVE-2023-3341)\n\nRobert Story discovered that Bind incorrectly handled certain DNS-over-TLS\nqueries. A remote attacker could possibly use this issue to cause Bind to\ncrash, resulting in a denial of service. This issue only affected Ubuntu\n22.04 LTS, and Ubuntu 23.04. (CVE-2023-4236)\n",
  "id": "USN-6390-1",
  "modified": "2026-04-22T07:37:06Z",
  "published": "2023-09-20T14:07:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6390-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-3341"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-4236"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "bind9 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2023-3341",
    "UBUNTU-CVE-2023-4236"
  ]
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

ubuntu-cve-2023-4236

Vulnerability from osv_ubuntu

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

usn-6390-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature