{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:starkbank:ecdsa-node:1.1.2:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "1.1.2"
              },
              {
                "last_affected": "1.1.2"
              }
            ],
            "source": [
              "CPE_STRING",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "49c6003f3259be3105995a8034510061c64dff16"
            },
            {
              "last_affected": "49c6003f3259be3105995a8034510061c64dff16"
            },
            {
              "fixed": "7ede23daff5e9faae43deed3c27549b55c5eb1d3"
            }
          ],
          "repo": "https://github.com/starkbank/ecdsa-node",
          "type": "GIT"
        }
      ],
      "versions": [
        "1.1.2"
      ]
    }
  ],
  "database_specific": {},
  "details": "The verify function in the Stark Bank Node.js ECDSA library (ecdsa-node) 1.1.2 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.",
  "id": "CVE-2021-43571",
  "modified": "2026-07-08T05:36:19.299071053Z",
  "published": "2021-11-09T22:15:07.683Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/starkbank/ecdsa-node/releases/tag/v1.1.3"
    },
    {
      "type": "EVIDENCE",
      "url": "https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}