vuln-cve/data/2023/4xxx/CVE-2023-4236.json

{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2023-4236",
        "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "state": "PUBLISHED",
        "assignerShortName": "isc",
        "dateReserved": "2023-08-08T10:23:50.680Z",
        "datePublished": "2023-09-20T12:32:16.631Z",
        "dateUpdated": "2025-02-13T17:09:18.327Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
                "shortName": "isc",
                "dateUpdated": "2023-11-03T20:06:12.271Z"
            },
            "title": "named may terminate unexpectedly under high DNS-over-TLS query load",
            "datePublic": "2023-09-20T00:00:00.000Z",
            "affected": [
                {
                    "vendor": "ISC",
                    "product": "BIND 9",
                    "versions": [
                        {
                            "version": "9.18.0",
                            "lessThanOrEqual": "9.18.18",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "9.18.11-S1",
                            "lessThanOrEqual": "9.18.18-S1",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "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."
                }
            ],
            "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."
                        }
                    ]
                }
            ],
            "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."
                }
            ],
            "exploits": [
                {
                    "lang": "en",
                    "value": "We are not aware of any active exploits."
                }
            ],
            "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."
                }
            ],
            "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."
                }
            ],
            "references": [
                {
                    "url": "https://kb.isc.org/docs/cve-2023-4236",
                    "name": "CVE-2023-4236",
                    "tags": [
                        "vendor-advisory"
                    ]
                },
                {
                    "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/"
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                {
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                },
                {
                    "url": "https://security.netapp.com/advisory/ntap-20231013-0004/"
                },
                {
                    "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VSK5V4W4OHPM3JTJGWAQD6CZW7SFD75B/"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            }
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-02T07:24:03.623Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://kb.isc.org/docs/cve-2023-4236",
                        "name": "CVE-2023-4236",
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                        "tags": [
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                    {
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}