Security advisory

{
  "id": "54a1efc7b77bfa0d4b1bc03377972f6b29c20fb8e7192506cd292a71e079de6c",
  "url": "https://osv.dev/vulnerability/CVE-2017-20240",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-20240",
    "summary": "Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks. These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.",
    "evidence": "osv:CVE-2017-20240",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2017-20240",
      "aliases": [
        "CVE-2017-20240"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/arodland/crypt-pbkdf2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "63bd1c8b74ea5a98c0566da99cdf9c84a87073bf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.261630"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.161520",
            "0.160410",
            "0.150900",
            "0.142390",
            "0.140890",
            "0.133330",
            "0.131750",
            "0.121930",
            "v0.112020",
            "v0.110461",
            "v0.110460",
            "v0.101170",
            "v0.101160"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-20240.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:45.635297534Z",
      "provider": "osv",
      "references": [
        "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148",
        "https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes",
        "https://github.com/arodland/Crypt-PBKDF2/pull/6"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-20240",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380779,
  "published_at": "2026-06-12T14:16:28.66+00:00"
}