{
  "document": {
    "aggregate_severity": {
      "text": "Low"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
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    "publisher": {
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/ubuntu18.04els/vex/2021/cve-2021-23239-els_os-ubuntu18_04els.json"
      }
    ],
    "title": "Security update on CVE-2021-23239",
    "tracking": {
      "current_release_date": "2026-01-19T22:45:01Z",
      "generator": {
        "date": "2026-01-19T22:45:01Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2021-23239-ELS_OS-UBUNTU18.04ELS",
      "initial_release_date": "2021-01-12T09:15:00Z",
      "revision_history": [
        {
          "date": "2021-01-12T09:15:00Z",
          "number": "1",
          "summary": "Initial version"
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        {
          "date": "2025-11-29T15:13:15Z",
          "number": "2",
          "summary": "Official Publication"
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        {
          "date": "2025-12-23T22:15:38Z",
          "number": "3",
          "summary": "Update document"
        },
        {
          "date": "2026-01-19T22:45:01Z",
          "number": "4",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
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        "relates_to_product_reference": "Ubuntu-18"
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        },
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        "relates_to_product_reference": "Ubuntu-18"
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-23239",
      "cwe": {
        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access ('Link Following')"
      },
      "notes": [
        {
          "category": "description",
          "text": "The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.",
          "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": {
        "fixed": [
          "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64",
          "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64",
          "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els1.amd64",
          "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64"
        ],
        "known_affected": [
          "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6.amd64",
          "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-23239"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23239",
          "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23239"
        },
        {
          "category": "external",
          "summary": "https://lists.debian.org/debian-lts-announce/2022/11/msg00007.html",
          "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00007.html"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/"
        },
        {
          "category": "external",
          "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/",
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/"
        },
        {
          "category": "external",
          "summary": "https://security.gentoo.org/glsa/202101-33",
          "url": "https://security.gentoo.org/glsa/202101-33"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20210129-0010/",
          "url": "https://security.netapp.com/advisory/ntap-20210129-0010/"
        },
        {
          "category": "external",
          "summary": "https://www.sudo.ws/stable.html#1.9.5",
          "url": "https://www.sudo.ws/stable.html#1.9.5"
        }
      ],
      "release_date": "2021-01-12T09:15:00Z",
      "remediations": [
        {
          "category": "none_available",
          "details": "Affected",
          "product_ids": [
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            "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6.amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 1.9,
            "baseSeverity": "LOW",
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:M/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
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            "Ubuntu-18:sudo-0:1.8.21p2-3ubuntu1.6+tuxcare.els2.amd64",
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            "Ubuntu-18:sudo-ldap-0:1.8.21p2-3ubuntu1.6.amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ]
    }
  ]
}