Security advisory

{
  "id": "b2cda62dcc5f976b02b383d8d5f981c766f1c1c3fdbd59650a545ff8105d97c1",
  "url": "https://osv.dev/vulnerability/CVE-2018-9275",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-9275",
    "summary": "In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors).",
    "evidence": "osv:CVE-2018-9275",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-9275",
      "aliases": [
        "CVE-2018-9275"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yubico/yubico-pam",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f5363a207b14d46b86022e598399a31201164594"
                },
                {
                  "last_affected": "432d7c60a1f64bfd1ad05683392cec36c6bc8455"
                },
                {
                  "fixed": "0f6ceabab0a8849b47f67d727aa526c2656089ba"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:yubico:yubico_pam:*:*:*:*:*:yubico:*:*",
                    "range": [
                      {
                        "introduced": "2.18"
                      },
                      {
                        "last_affected": "2.25"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0f6ceabab0a8849b47f67d727aa526c2656089ba"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.25",
            "2.24",
            "2.23",
            "2.22",
            "2.21",
            "2.20",
            "2.19",
            "2.18"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-9275.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-9275-73e96989",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "226607563752128757887514930765907415801",
                    "279701570390930019583909742435872770862",
                    "308494850977619412175153327874514612777",
                    "203417458892300943278019038761638732730"
                  ]
                },
                "source": "https://github.com/yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba",
                "target": {
                  "file": "util.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-9275-fa157aba",
                "digest": {
                  "length": 1698,
                  "function_hash": "119299559369141334615512022658670539382"
                },
                "source": "https://github.com/yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba",
                "target": {
                  "file": "util.c",
                  "function": "check_user_token"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:45:09Z"
          }
        }
      ],
      "modified": "2026-10-20T13:45:09.988395123Z",
      "provider": "osv",
      "references": [
        "https://bugzilla.opensuse.org/show_bug.cgi?id=1088027",
        "https://github.com/Yubico/yubico-pam/issues/136",
        "https://github.com/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-9275",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388075,
  "published_at": "2018-04-04T18:29:02.497+00:00"
}