cve-2023-2829
Vulnerability from cvelistv5
Published
2023-06-21 16:26
Modified
2024-12-06 18:34
Summary
Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled
Impacted products
Vendor Product Version
Show details on NVD website


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            "tags": [
              "x_transferred"
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            "url": "https://security.netapp.com/advisory/ntap-20230703-0010/"
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        "title": "CVE Program Container"
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        "metrics": [
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              "content": {
                "id": "CVE-2023-2829",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2024-12-06T18:34:26.527193Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
          "versions": [
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              "lessThanOrEqual": "9.16.41-S1",
              "status": "affected",
              "version": "9.16.8-S1",
              "versionType": "custom"
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              "version": "9.18.11-S1",
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      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Greg Kuechle from SaskTel for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2023-06-21T00:00:00Z",
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          "lang": "en",
          "value": "A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1."
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              "lang": "en",
              "value": "By sending specific queries to the resolver, an attacker can cause `named` to terminate unexpectedly.\n\nNote that the BIND configuration option `synth-from-dnssec` is enabled by default in all versions of BIND 9.18 and 9.18-S and newer. In earlier versions of BIND that had this option available, it was disabled unless activated explicitly in `named.conf`."
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            "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"
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      "providerMetadata": {
        "dateUpdated": "2023-06-21T16:26:24.932Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
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        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20230703-0010/"
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      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.42-S1 or 9.18.16-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled",
      "workarounds": [
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          "lang": "en",
          "value": "Setting `synth-from-dnssec` to `no` prevents the problem."
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    "assignerShortName": "isc",
    "cveId": "CVE-2023-2829",
    "datePublished": "2023-06-21T16:26:24.932Z",
    "dateReserved": "2023-05-22T07:57:43.061Z",
    "dateUpdated": "2024-12-06T18:34:46.254Z",
    "state": "PUBLISHED"
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}


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