{
  "id": "CVE-2023-26556",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2023-04-21T18:15:07.927",
  "lastModified": "2023-05-02T17:05:35.907",
  "vulnStatus": "Analyzed",
  "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.)"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:iofinnet:tss-lib:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "2.0.0",
              "matchCriteriaId": "5A407DB0-D561-404E-941A-EF988ABB8BDB"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0",
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/bnb-chain/tss-lib/tree/v1.3.5",
      "source": "cve@mitre.org",
      "tags": [
        "Product"
      ]
    },
    {
      "url": "https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3",
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://medium.com/@iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b",
      "source": "cve@mitre.org",
      "tags": [
        "Not Applicable",
        "Third Party Advisory"
      ]
    }
  ]
}