{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright © Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update for cloud-init is now available for Red Hat Enterprise Linux 8.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special scripts to run during initialization to retrieve and install SSH keys, and to let the user run various scripts.\n\nUsers of cloud-init are advised to upgrade to these updated packages.",
        "title": "Details"
      },
      {
        "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 Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHBA-2019:1992",
        "url": "https://access.redhat.com/errata/RHBA-2019:1992"
      },
      {
        "category": "external",
        "summary": "1687563",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1687563"
      },
      {
        "category": "external",
        "summary": "1728625",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1728625"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2019/rhba-2019_1992.json"
      }
    ],
    "title": "Red Hat Bug Fix Advisory: cloud-init bug fix and enhancement update",
    "tracking": {
      "current_release_date": "2025-11-21T17:21:59+00:00",
      "generator": {
        "date": "2025-11-21T17:21:59+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.6.12"
        }
      },
      "id": "RHBA-2019:1992",
      "initial_release_date": "2019-07-30T19:33:22+00:00",
      "revision_history": [
        {
          "date": "2019-07-30T19:33:22+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2019-07-30T19:33:22+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2025-11-21T17:21:59+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux AppStream (v. 8)",
                "product": {
                  "name": "Red Hat Enterprise Linux AppStream (v. 8)",
                  "product_id": "AppStream-8.0.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:enterprise_linux:8::appstream"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "cloud-init-0:18.5-1.el8.4.src",
                "product": {
                  "name": "cloud-init-0:18.5-1.el8.4.src",
                  "product_id": "cloud-init-0:18.5-1.el8.4.src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/cloud-init@18.5-1.el8.4?arch=src"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "cloud-init-0:18.5-1.el8.4.noarch",
                "product": {
                  "name": "cloud-init-0:18.5-1.el8.4.noarch",
                  "product_id": "cloud-init-0:18.5-1.el8.4.noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/cloud-init@18.5-1.el8.4?arch=noarch"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cloud-init-0:18.5-1.el8.4.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)",
          "product_id": "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.noarch"
        },
        "product_reference": "cloud-init-0:18.5-1.el8.4.noarch",
        "relates_to_product_reference": "AppStream-8.0.1"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cloud-init-0:18.5-1.el8.4.src as a component of Red Hat Enterprise Linux AppStream (v. 8)",
          "product_id": "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.src"
        },
        "product_reference": "cloud-init-0:18.5-1.el8.4.src",
        "relates_to_product_reference": "AppStream-8.0.1"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2019-0816",
      "cwe": {
        "id": "CWE-285",
        "name": "Improper Authorization"
      },
      "discovery_date": "2019-02-22T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1680165"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A security feature bypass exists in Azure SSH Keypairs, due to a change in the provisioning logic for some Linux images that use cloud-init, aka 'Azure SSH Keypairs Security Feature Bypass Vulnerability'.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "cloud-init: extra ssh keys added to authorized_keys on the Azure platform",
          "title": "Vulnerability summary"
        },
        {
          "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": [
          "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.noarch",
          "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.src"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-0816"
        },
        {
          "category": "external",
          "summary": "RHBZ#1680165",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1680165"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-0816",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-0816"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-0816",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-0816"
        },
        {
          "category": "external",
          "summary": "https://support.microsoft.com/en-us/help/4491476/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm",
          "url": "https://support.microsoft.com/en-us/help/4491476/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm"
        }
      ],
      "release_date": "2019-03-05T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2019-07-30T19:33:22+00:00",
          "details": "For details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.noarch",
            "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.src"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHBA-2019:1992"
        },
        {
          "category": "workaround",
          "details": "See steps from https://support.microsoft.com/en-us/help/4491476/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm",
          "product_ids": [
            "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.noarch",
            "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.src"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.0"
          },
          "products": [
            "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.noarch",
            "AppStream-8.0.1:cloud-init-0:18.5-1.el8.4.src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "cloud-init: extra ssh keys added to authorized_keys on the Azure platform"
    }
  ]
}