CVE-2023-26557

Published Apr 21, 2023

Last updated a year ago

Overview

Description: io.finnet tss-lib before 2.0.0 can leak the lambda value of a private key via a timing side-channel attack because it relies on Go big.Int, which is not constant time for Cmp, modular exponentiation, or modular inverse. An example leak is in crypto/paillier/paillier.go. (bnb-chain/tss-lib and thorchain/tss are also affected.)
Source: cve@mitre.org
NVD status: Modified

Risk scores

CVSS 3.1

Type: Primary
Base score: 7.5
Impact score: 3.6
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: HIGH

Weaknesses

nvd@nist.gov: CWE-203

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:iofinnet:tss-lib:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "5A407DB0-D561-404E-941A-EF988ABB8BDB",
            "versionEndExcluding": "2.0.0"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

References