{
  "cveId": "CVE-2019-0816",
  "url": "https://patchblox.com/security/cve/CVE-2019-0816",
  "summary": "CVE-2019-0816 is fixed in 2 products on 2 platforms, first by KB4491476, released March 12, 2019. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Azure SSH Keypairs Security Feature Bypass Vulnerability",
  "description": "\u003Cp\u003EA security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init.  Extraneous Microsoft service public keys can be unexpectedly added to the VM authorized keys file in the limited scenarios described in \u003Ca href=\u0022https://support.microsoft.com/en-us/help/4491476/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm\u0022\u003E4491476\u003C/a\u003E.\u00A0For more information on how to know if you are affected and how to protect yourself, please see \u003Ca href=\u0022https://support.microsoft.com/en-us/help/4491476/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm\u0022\u003E4491476\u003C/a\u003E.\u003C/p\u003E\n\u003Cp\u003EThis update addresses this vulnerability by preventing these keys from being added.\u003C/p\u003E",
  "published": "2019-03-12T07:00:00Z",
  "severity": "Moderate",
  "cvss": 5.4,
  "epss": 0.01403,
  "epssPercentile": 0.72707,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0816",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "UbuntuServer:18.04-LTS",
      "fixedVersion": "",
      "fix": "KB4491476",
      "url": "https://patchblox.com/security/fix/microsoft/kb4491476",
      "released": "2019-03-12T07:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cloud-init",
      "release": "RHEL 8",
      "fixedVersion": "0:18.5-1.el8.4",
      "fix": "RHBA-2019:1992",
      "url": "https://patchblox.com/security/fix/linux/rhba-2019-1992",
      "released": "2019-07-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cloud-init",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "18.5-45-g3554ffe8-0ubuntu1~18.04.1",
      "fix": "cloud-init 18.5-45-g3554ffe8-0ubuntu1~18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cloud-init-18.5-45-g3554ffe8-0ubuntu1-18.04.1",
      "released": "2019-04-08T20:29:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}