Security advisory

{
  "id": "7b65d91c192191717f6d56531a964d412f161f3539617755467e01d5d8ef1b51",
  "url": "https://osv.dev/vulnerability/CVE-2019-12209",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-12209",
    "summary": "Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.",
    "evidence": "osv:CVE-2019-12209",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-12209",
      "aliases": [
        "CVE-2019-12209"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yubico/pam-u2f",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "pam_u2f-1.0.7",
            "pam_u2f-1.0.6",
            "pam_u2f-1.0.5",
            "pam_u2f-1.0.4",
            "pam_u2f-1.0.3",
            "pam_u2f-1.0.2",
            "pam_u2f-1.0.1",
            "pam_u2f-1.0.0",
            "pam_u2f-0.0.1",
            "pam_u2f-0.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12209.json",
            "vanir_signatures": [
              {
                "id": "CVE-2019-12209-4c8a7ade",
                "digest": {
                  "length": 6318,
                  "function_hash": "190092078713224981052794975657320798984"
                },
                "source": "https://github.com/yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3",
                "target": {
                  "file": "pam-u2f.c",
                  "function": "pam_sm_authenticate"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2019-12209-ee50519a",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                    "159044414741092336700454310254793686751"
                  ]
                },
                "source": "https://github.com/yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3",
                "target": {
                  "file": "pam-u2f.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:39:47Z"
          }
        }
      ],
      "modified": "2026-10-20T13:39:47.393305431Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FOR4ADC356JPCHAJI5UXZORLC3VNBPS/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZCGU6UQLI3ZTW3UYCTMQW7VDL5M4LCWR/",
        "https://developers.yubico.com/pam-u2f/Release_Notes.html",
        "https://github.com/Yubico/pam-u2f/commit/7db3386fcdb454e33a3ea30dcfb8e8960d4c3aa3"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:yubico:pam-u2f:1.0.7:*:*:*:*:*:*:*"
            ],
            "vendor_product": "yubico:pam-u2f",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.0.7"
                  },
                  {
                    "last_affected": "1.0.7"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-12209",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387918,
  "published_at": "2019-06-04T21:29:00.78+00:00"
}