{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.32"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "143a88d80c477de0d70cc69d9fd911b134f4d589"
            },
            {
              "fixed": "f960ce75502acf7404187231a706672f8369acb2"
            }
          ],
          "repo": "https://github.com/fgasper/p5-crypt-perl",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Crypt::Perl::ECDSA in the Crypt::Perl (aka p5-Crypt-Perl) module before 0.32 for Perl fails to verify correct ECDSA signatures when r and s are small and when s = 1. This happens when using the curve secp256r1 (prime256v1). This could conceivably have a security-relevant impact if an attacker wishes to use public r and s values when guessing whether signature verification will fail.",
  "id": "CVE-2020-13895",
  "modified": "2026-03-13T21:48:11.576272301Z",
  "published": "2020-06-07T01:15:10.550Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/FGasper/p5-Crypt-Perl/issues/14"
    },
    {
      "type": "FIX",
      "url": "https://github.com/FGasper/p5-Crypt-Perl/commit/f960ce75502acf7404187231a706672f8369acb2"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}