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GHSA-M95P-425X-X889

Vulnerability from github – Published: 2025-11-25 20:41 – Updated: 2025-11-27 08:59
VLAI
Summary
cggmp21 has a missing check in the ZK proof used in CGGMP21
Details

Impact

cggmp21 concerns a missing check in the ZK proof that enables an attack in which a single malicious signer can reconstruct full private key.

Patches

  • cggmp21 v0.6.3 is a patch release that contains a fix that introduces this specific missing check
  • However, cggmp21 recommends upgrading to cggmp24 v0.7.0-alpha.2 which contains many other security checks as a precaution. Follow migration guideline to upgrade.

Workarounds

Update to cggmp21 v0.6.3, a minor release that contains a minimal security patch.

However, for full mitigation, users will need to upgrade to cggmp24 v0.7.0-alpha.2 as it contains many more security check implementations.

Resources

Read this blog post to learn more.

Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "cggmp21"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "cggmp24"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.0-alpha.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-66016"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345",
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-25T20:41:04Z",
    "nvd_published_at": "2025-11-25T20:16:00Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\ncggmp21  concerns a missing check in the ZK proof that enables an attack in which a single malicious signer can reconstruct full private key.\n\n### Patches\n* `cggmp21 v0.6.3` is a patch release that contains a fix that introduces this specific missing check\n* However, cggmp21 recommends upgrading to `cggmp24 v0.7.0-alpha.2` which contains many other security checks as a precaution. Follow [migration guideline](https://github.com/LFDT-Lockness/cggmp21/blob/v0.7.0-alpha.2/CGGMP21_MIGRATION.md) to upgrade.\n\n### Workarounds\nUpdate to `cggmp21 v0.6.3`, a minor release that contains a minimal security patch.\n\nHowever, for full mitigation, users will need to upgrade to `cggmp24 v0.7.0-alpha.2` as it contains many more security check implementations.\n\n### Resources\nRead this [blog post](https://www.dfns.co/article/cggmp21-vulnerabilities-patched-and-explained) to learn more.",
  "id": "GHSA-m95p-425x-x889",
  "modified": "2025-11-27T08:59:47Z",
  "published": "2025-11-25T20:41:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/LFDT-Lockness/cggmp21/security/advisories/GHSA-m95p-425x-x889"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66016"
    },
    {
      "type": "WEB",
      "url": "https://github.com/LFDT-Lockness/cggmp21/commit/60e0ada5291e771d5649793329d99edd32285e72"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/LFDT-Lockness/cggmp21"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0129.html"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0130.html"
    },
    {
      "type": "WEB",
      "url": "https://www.dfns.co/article/cggmp21-vulnerabilities-patched-and-explained"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "cggmp21 has a missing check in the ZK proof used in CGGMP21"
}



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