{
  "cveId": "CVE-2019-19234",
  "url": "https://patchblox.com/security/cve/CVE-2019-19234",
  "summary": "CVE-2019-19234 is fixed in 2 products on 1 platform, first by sudo 1.8.31-1ubuntu1, released December 19, 2019. It is not reported as exploited. Patch Radar priority: High.",
  "title": "sudo: In Sudo through 1.8.29, the fact that a user has been blocked (e.g., by using the ! character in the shadow file inst...",
  "description": "In Sudo through 1.8.29, the fact that a user has been blocked (e.g., by using the ! character in the shadow file instead of a password hash) is not considered, allowing an attacker (who has access to a Runas ALL sudoer account) to impersonate any blocked user. NOTE: The software maintainer believes that this CVE is not valid. Disabling local password authentication for a user is not the same as disabling all access to that user--the user may still be able to login via other means (ssh key, kerberos, etc). Both the Linux shadow(5) and passwd(1) manuals are clear on this. Indeed it is a valid use case to have local accounts that are _only_ accessible via sudo and that cannot be logged into with a password. Sudo 1.8.30 added an optional setting to check the _shell_ of the target user (not the encrypted password!) against the contents of /etc/shells but that is not the same thing as preventing access to users with an invalid password hash",
  "published": "2019-12-19T13:15:00Z",
  "severity": "Low",
  "cvss": 7.5,
  "epss": 0.0317,
  "epssPercentile": 0.8822,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "sudo",
      "release": "RHEL 8",
      "fixedVersion": "0:1.8.29-5.el8",
      "fix": "RHSA-2020:1804",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-1804",
      "released": "2020-04-28T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.8.31-1ubuntu1",
      "fix": "sudo 1.8.31-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-sudo-1.8.31-1ubuntu1",
      "released": "2019-12-19T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "sudo-ldap",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.8.31-1ubuntu1",
      "fix": "sudo-ldap 1.8.31-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-sudo-ldap-1.8.31-1ubuntu1",
      "released": "2019-12-19T13:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-13T14:02:24Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}