CVE-2023-26556

Published Apr 21, 2023 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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.)

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-1436 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.)
Github GHSA Github GHSA GHSA-3w84-4mjc-rjw7 IO FinNet tss-lib vulnerable to timing attack from non-constant time scalar multiplication
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Feb 5, 2025, 2:43 PM
Reserved
Feb 26, 2023, 12:00 AM
Status
Modified
Published
Apr 21, 2023, 6:15 PM
Modified
Jun 17, 2026, 5:43 AM