Vulnerability-Lookup

GHSA-WGQ8-VR6R-MQXM

Vulnerability from github – Published: 2025-09-03 21:29 – Updated: 2025-09-05 16:11

Summary

frost-core: refresh shares with smaller min_signers will reduce security of group

Details

Impact

It was not clear that it is not possible to change min_signers (i.e. the threshold) with the refresh share functionality (frost_core::keys::refresh module). Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold; however, this could cause a security loss to the participant's shares. We have not determined the exact security implications of doing so and judged simpler to just validate min_signers.

If for some reason you have done a refresh share procedure with a smaller min_signers we strongly recommend migrating to a new key.

Patches

Updating to 2.2.0 will ensure that the min_signers parameter will be validated. However it won't restore the security of groups refreshed with a smaller min_signers parameters.

Workarounds

You don't need to update if you don't use the refresh share functionality, or if you didn't try to change the min_signers parameter using the refresh share functionality.

References

Thank you BlockSec for reporting the finding

Severity

6.0 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "frost-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-58359"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269",
      "CWE-325"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-03T21:29:18Z",
    "nvd_published_at": "2025-09-05T00:15:32Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nIt was not clear that it is not possible to change `min_signers` (i.e. the threshold) with the refresh share functionality (`frost_core::keys::refresh` module). Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold; however, this could cause a security loss to the participant\u0027s shares. We have not determined the exact security implications of doing so and judged simpler to just validate `min_signers`. \n\n If for some reason you have done a refresh share procedure with a smaller `min_signers` we strongly recommend migrating to a new key. \n\n### Patches\n\nUpdating to 2.2.0 will ensure that the `min_signers` parameter will be validated. However it won\u0027t restore the security of groups refreshed with a smaller `min_signers` parameters.\n\n### Workarounds\n\nYou don\u0027t need to update if you don\u0027t use the refresh share functionality, or if you didn\u0027t try to change the `min_signers` parameter using the refresh share functionality.\n\n### References\n\nThank you [BlockSec](https://blocksec.com/) for reporting the finding",
  "id": "GHSA-wgq8-vr6r-mqxm",
  "modified": "2025-09-05T16:11:20Z",
  "published": "2025-09-03T21:29:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ZcashFoundation/frost/security/advisories/GHSA-wgq8-vr6r-mqxm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58359"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ZcashFoundation/frost/commit/379ef689c733b3d9c80fd409071d4f3af4dafed2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ZcashFoundation/frost"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ZcashFoundation/frost/releases/tag/frost-core%2Fv2.2.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "frost-core: refresh shares with smaller min_signers will reduce security of group"
}

CVE-2025-58359 (GCVE-0-2025-58359)

Vulnerability from cvelistv5 – Published: 2025-09-04 23:50 – Updated: 2025-09-05 16:06

Title

frost-core: refresh shares with smaller min_signers will reduce group security

Summary

ZF FROST is a Rust implementation of FROST (Flexible Round-Optimised Schnorr Threshold signatures). In versions 2.0.0 through 2.1.0, refresh shares with smaller min_signers will reduce security of group. The inability to change min_signers (i.e. the threshold) with the refresh share functionality (frost_core::keys::refresh module) was not made clear to users. Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold, potentially causing a security loss to the participant's shares. This issue is fixed in version 2.2.0.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-05 16:05 UTC

CWE

CWE-325 - Missing Cryptographic Step

Assigner

GitHub_M mitre root Scorecard

References

3 references

URL	Tags
https://github.com/ZcashFoundation/frost/security…	x_refsource_CONFIRM
https://github.com/ZcashFoundation/frost/commit/3…	x_refsource_MISC
https://github.com/ZcashFoundation/frost/releases…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ZcashFoundation	frost	Affected: >= 2.0.0, < 2.2.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-58359",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-05T16:05:51.869099Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-05T16:06:05.432Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "frost",
          "vendor": "ZcashFoundation",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 2.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "ZF FROST is a Rust implementation of FROST (Flexible Round-Optimised Schnorr Threshold signatures). In versions 2.0.0 through 2.1.0, refresh shares with smaller min_signers will reduce security of group. The inability to change min_signers (i.e. the threshold) with the refresh share functionality (frost_core::keys::refresh module) was not made clear to users. Using a smaller value would not decrease the threshold, and attempts to sign using a smaller threshold would fail. Additionally, after refreshing the shares with a smaller threshold, it would still be possible to sign with the original threshold, potentially causing a security loss to the participant\u0027s shares. This issue is fixed in version 2.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-325",
              "description": "CWE-325: Missing Cryptographic Step",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-04T23:50:45.746Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ZcashFoundation/frost/security/advisories/GHSA-wgq8-vr6r-mqxm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ZcashFoundation/frost/security/advisories/GHSA-wgq8-vr6r-mqxm"
        },
        {
          "name": "https://github.com/ZcashFoundation/frost/commit/379ef689c733b3d9c80fd409071d4f3af4dafed2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ZcashFoundation/frost/commit/379ef689c733b3d9c80fd409071d4f3af4dafed2"
        },
        {
          "name": "https://github.com/ZcashFoundation/frost/releases/tag/frost-core%2Fv2.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ZcashFoundation/frost/releases/tag/frost-core%2Fv2.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-wgq8-vr6r-mqxm",
        "discovery": "UNKNOWN"
      },
      "title": "frost-core: refresh shares with smaller min_signers will reduce group security"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-58359",
    "datePublished": "2025-09-04T23:50:45.746Z",
    "dateReserved": "2025-08-29T16:19:59.010Z",
    "dateUpdated": "2025-09-05T16:06:05.432Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

GHSA-WGQ8-VR6R-MQXM

Impact

Patches

Workarounds

References

CVE-2025-58359 (GCVE-0-2025-58359)

Tags

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