GHSA-92VM-MXJF-JQF3

Vulnerability from github – Published: 2021-11-10 20:41 – Updated: 2024-10-25 14:49
VLAI?
Summary
Improper Verification of Cryptographic Signature in starkbank-ecdsa
Details

The verify function in the Stark Bank Python ECDSA library (starkbank-ecdsa) 2.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "starkbank-ecdsa"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-43572"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-11-10T18:23:18Z",
    "nvd_published_at": "2021-11-09T22:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "The `verify` function in the Stark Bank Python ECDSA library (starkbank-ecdsa) 2.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.",
  "id": "GHSA-92vm-mxjf-jqf3",
  "modified": "2024-10-25T14:49:40Z",
  "published": "2021-11-10T20:41:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43572"
    },
    {
      "type": "WEB",
      "url": "https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/starkbank-ecdsa/PYSEC-2021-426.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/starkbank/ecdsa-python"
    },
    {
      "type": "WEB",
      "url": "https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1"
    },
    {
      "type": "WEB",
      "url": "https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improper Verification of Cryptographic Signature in starkbank-ecdsa"
}


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