{"id":"CVE-2025-66017","state":"PUBLISHED","title":"CGGMP21 presignatures can be used in the way that significantly reduces security","description":"CGGMP24 is a state-of-art ECDSA TSS protocol that supports 1-round signing (requires 3 preprocessing rounds), identifiable abort, and a key refresh protocol. In versions 0.6.3 and prior of cggmp21 and version 0.7.0-alpha.1 of cggmp24, presignatures can be used in the way that significantly reduces security. cggmp24 version 0.7.0-alpha.2 release contains API changes that make it impossible to use presignatures in contexts in which it reduces security.","publishedAt":"2025-11-25T19:59:07.956Z","updatedAt":"2025-11-25T20:48:35.800Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["LFDT-Lockness cggmp21"],"affected":[{"vendor":"LFDT-Lockness","product":"cggmp21","versions":[{"version":"cggmp21 <= 0.6.3","status":"affected"},{"version":"cggmp24 = 0.7.0-alpha.1","status":"affected"}]}],"references":["https://github.com/LFDT-Lockness/cggmp21/security/advisories/GHSA-8frv-q972-9rq5","https://www.dfns.co/article/cggmp21-vulnerabilities-patched-and-explained"],"weaknesses":["CWE-327"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/66xxx/CVE-2025-66017.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66017","state":"PUBLISHED","datePublished":"2025-11-25T19:59:07.956Z","dateUpdated":"2025-11-25T20:48:35.800Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-11-21T01:08:02.613Z"},"containers":{"cna":{"title":"CGGMP21 presignatures can be used in the way that significantly reduces security","descriptions":[{"lang":"en","value":"CGGMP24 is a state-of-art ECDSA TSS protocol that supports 1-round signing (requires 3 preprocessing rounds), identifiable abort, and a key refresh protocol. In versions 0.6.3 and prior of cggmp21 and version 0.7.0-alpha.1 of cggmp24, presignatures can be used in the way that significantly reduces security. cggmp24 version 0.7.0-alpha.2 release contains API changes that make it impossible to use presignatures in contexts in which it reduces security."}],"affected":[{"vendor":"LFDT-Lockness","product":"cggmp21","versions":[{"version":"cggmp21 <= 0.6.3","status":"affected"},{"version":"cggmp24 = 0.7.0-alpha.1","status":"affected"}]}],"references":[{"url":"https://github.com/LFDT-Lockness/cggmp21/security/advisories/GHSA-8frv-q972-9rq5","name":"https://github.com/LFDT-Lockness/cggmp21/security/advisories/GHSA-8frv-q972-9rq5","tags":["x_refsource_CONFIRM"]},{"url":"https://www.dfns.co/article/cggmp21-vulnerabilities-patched-and-explained","name":"https://www.dfns.co/article/cggmp21-vulnerabilities-patched-and-explained","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-327","lang":"en","description":"CWE-327: Use of a Broken or Risky Cryptographic Algorithm","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-11-25T20:42:38.004Z"},"source":{"advisory":"GHSA-8frv-q972-9rq5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-11-25T20:43:57.315814Z","id":"CVE-2025-66017","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-11-25T20:48:35.800Z"}}]}}}