GHSA-3W84-4MJC-RJW7

Vulnerability from github – Published: 2023-04-21 18:30 – Updated: 2025-02-05 19:42
VLAI?
Summary
IO FinNet tss-lib vulnerable to timing attack from non-constant time scalar multiplication
Details

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.)

Severity ?
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/bnb-chain/tss-lib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/binance-chain/tss-lib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-26556"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-02-05T19:42:53Z",
    "nvd_published_at": "2023-04-21T18:15:07Z",
    "severity": "CRITICAL"
  },
  "details": "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.)",
  "id": "GHSA-3w84-4mjc-rjw7",
  "modified": "2025-02-05T19:42:53Z",
  "published": "2023-04-21T18:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26556"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bnb-chain/tss-lib/issues/44"
    },
    {
      "type": "WEB",
      "url": "https://github.com/IoFinnet/tss-lib/releases/tag/v2.0.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bnb-chain/tss-lib"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bnb-chain/tss-lib/releases/tag/v2.0.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bnb-chain/tss-lib/tree/v1.3.5"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/thorchain/tss/tss-lib/-/tags/v0.1.3"
    },
    {
      "type": "WEB",
      "url": "https://medium.com/@iofinnet/security-disclosure-for-ecdsa-and-eddsa-threshold-signature-schemes-4e969af7155b"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2023-1732"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "IO FinNet tss-lib vulnerable to timing attack from non-constant time scalar multiplication"
}


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