{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.4"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3aad811738443cc4e407e381a8ac700d6934e7b1"
            }
          ],
          "repo": "https://github.com/samuel-tyler/fast_ber",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in fast_ber through v0.4. yy::yylex() in asn_compiler.hpp has a heap-based buffer over-read.",
  "id": "CVE-2020-23921",
  "modified": "2026-03-13T21:52:14.703646411Z",
  "published": "2021-04-21T18:15:08.307Z",
  "references": [
    {
      "type": "ARTICLE",
      "url": "https://cwe.mitre.org/data/definitions/126.html"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/Samuel-Tyler/fast_ber/issues/30"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}