{
  "document": {
    "aggregate_severity": {
      "text": "Critical"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/centos8.4els/vex/2021/cve-2021-20232-els_os-centos8_4els.json"
      }
    ],
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      "current_release_date": "2026-04-15T23:08:09Z",
      "generator": {
        "date": "2026-04-15T23:08:09Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2021-20232-ELS_OS-CENTOS8.4ELS",
      "initial_release_date": "2021-03-12T19:15:00Z",
      "revision_history": [
        {
          "date": "2021-03-12T19:15:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-04-15T23:08:09Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2021-20232"
  },
  "product_tree": {
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          {
            "branches": [
              {
                "category": "product_name",
                "name": "Community Enterprise Operating System 8.4",
                "product": {
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                  "product_id": "CentOS-8.4",
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                  }
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        ],
        "category": "vendor",
        "name": "Red Hat, Inc."
      },
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        "name": "CloudLinux"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "nettle-0:3.4.1-7.el8.tuxcare.els1.i686 as a component of Community Enterprise Operating System 8.4",
          "product_id": "CentOS-8.4:nettle-0:3.4.1-7.el8.tuxcare.els1.i686"
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        "relates_to_product_reference": "CentOS-8.4"
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-20232",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "under_investigation": [
          "CentOS-8.4:nettle-0:3.4.1-7.el8.tuxcare.els1.i686",
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          "CentOS-8.4:nettle-devel-0:3.4.1-7.el8.tuxcare.els1.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-20232"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=1922275",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1922275"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread.html/r50661d6f0082709aad9a584431b59ec364f9974b63b07e0800230168%40%3Cissues.spark.apache.org%3E",
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        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OSLAE6PP33A7VYRYMYMUVB3U6B26GZER/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OSLAE6PP33A7VYRYMYMUVB3U6B26GZER/"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20210416-0005/",
          "url": "https://security.netapp.com/advisory/ntap-20210416-0005/"
        },
        {
          "category": "external",
          "summary": "https://www.gnutls.org/security-new.html#GNUTLS-SA-2021-03-10",
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      ],
      "release_date": "2021-03-12T19:15:00Z",
      "remediations": [
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          "category": "none_available",
          "details": "Affected",
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            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 7.5,
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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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        }
      ],
      "threats": [
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          "category": "impact",
          "details": "Critical"
        }
      ]
    }
  ]
}