{"id":"CVE-2023-26556","state":"PUBLISHED","title":"io.finnet tss-lib before 2.0.0 can leak a secret key via a timing side-channel attack because it relies on the scalar-multiplication implementation in Go crypto/elliptic, which is ","description":"io.finnet tss-lib before 2.0.0 can leak a secret key via a timing side-channel attack because it relies on the scalar-multiplication implementation in Go crypto/elliptic, which is not constant time (there is an if statement in a loop). One leak is in ecdsa/keygen/round_2.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)","publishedAt":"2023-04-21T00:00:00.000Z","updatedAt":"2025-02-05T14:43:19.328Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0","https://github.com/bnb-chain/tss-lib/tree/v1.3.5","https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3","https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b"],"weaknesses":["CWE-203"],"ingestedAt":"2026-10-29T20:05:43.909Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/26xxx/CVE-2023-26556.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-26556","state":"PUBLISHED","datePublished":"2023-04-21T00:00:00.000Z","dateUpdated":"2025-02-05T14:43:19.328Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2023-02-26T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"io.finnet tss-lib before 2.0.0 can leak a secret key via a timing side-channel attack because it relies on the scalar-multiplication implementation in Go crypto/elliptic, which is not constant time (there is an if statement in a loop). One leak is in ecdsa/keygen/round_2.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)"}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0"},{"url":"https://github.com/bnb-chain/tss-lib/tree/v1.3.5"},{"url":"https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3"},{"url":"https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b"}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"n/a"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2023-04-21T00:00:00.000Z"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0","tags":["x_transferred"]},{"url":"https://github.com/bnb-chain/tss-lib/tree/v1.3.5","tags":["x_transferred"]},{"url":"https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3","tags":["x_transferred"]},{"url":"https://medium.com/%40iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T11:53:54.326Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.1,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-02-05T14:43:10.203960Z","id":"CVE-2023-26556","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-203","type":"CWE","lang":"en","description":"CWE-203 Observable Discrepancy"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-02-05T14:43:19.328Z"}}]}}}