{
  "cveId": "CVE-2021-23239",
  "url": "https://patchblox.com/security/cve/CVE-2021-23239",
  "summary": "CVE-2021-23239 is fixed in 3 products on 1 platform, first by sudo 1.8.21p2-3ubuntu1.4, released January 26, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libnss-sudo: The sudoedit personality of Sudo before 1.9.5 may allow a localunprivileged user to perform arbitrary directory-exist...",
  "description": "The sudoedit personality of Sudo before 1.9.5 may allow a localunprivileged user to perform arbitrary directory-existence tests by winninga sudo_edit.c race condition in replacing a user-controlled directory by asymlink to an arbitrary path.",
  "published": "2021-01-12T01:15:00Z",
  "severity": "Low",
  "cvss": 2.5,
  "epss": 0.01042,
  "epssPercentile": 0.64276,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libnss-sudo",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "1.9.4p2-2ubuntu2",
      "fix": "libnss-sudo 1.9.4p2-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libnss-sudo-1.9.4p2-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "libnss-sudo",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "1.9.4p2-2ubuntu2",
      "fix": "libnss-sudo 1.9.4p2-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libnss-sudo-1.9.4p2-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "RHEL 8",
      "fixedVersion": "0:1.8.29-7.el8",
      "fix": "RHSA-2021:1723",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-1723",
      "released": "2021-05-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.8.21p2-3ubuntu1.4",
      "fix": "sudo 1.8.21p2-3ubuntu1.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-sudo-1.8.21p2-3ubuntu1.4",
      "released": "2021-01-26T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.8.31-1ubuntu1.2",
      "fix": "sudo 1.8.31-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-sudo-1.8.31-1ubuntu1.2",
      "released": "2021-01-26T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "1.9.4p2-2ubuntu2",
      "fix": "sudo 1.9.4p2-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-sudo-1.9.4p2-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "1.9.4p2-2ubuntu2",
      "fix": "sudo 1.9.4p2-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-sudo-1.9.4p2-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "ol 8",
      "fixedVersion": "0:1.8.29-7.el8",
      "fix": "ELSA-2021-1723",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-1723",
      "released": "2021-05-25T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo-ldap",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.8.21p2-3ubuntu1.4",
      "fix": "sudo-ldap 1.8.21p2-3ubuntu1.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-sudo-ldap-1.8.21p2-3ubuntu1.4",
      "released": "2021-01-26T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo-ldap",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.8.31-1ubuntu1.2",
      "fix": "sudo-ldap 1.8.31-1ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-sudo-ldap-1.8.31-1ubuntu1.2",
      "released": "2021-01-26T10:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo-ldap",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "1.9.4p2-2ubuntu2",
      "fix": "sudo-ldap 1.9.4p2-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-sudo-ldap-1.9.4p2-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "sudo-ldap",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "1.9.4p2-2ubuntu2",
      "fix": "sudo-ldap 1.9.4p2-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-sudo-ldap-1.9.4p2-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}