Improper Verification of Cryptographic Signature in starkbank-ecdsa

KRITISCH 9.8CVE-2021-43571 · GHSA-q9q6-f556-gpm7 · Published 09/11/2021 · updated 17/06/2026

Kurz gesagt

CVE-2021-43571 ist eine Schwachstelle (KRITISCH (CVSS 9.8)) in ecdsa-node (starkbank), starkbank-ecdsa.
Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 1.0%, höher als bei 63.7% aller Schwachstellen.
Abhilfe: auf 1.1.3 oder neuer aktualisieren.

Package	Affected versions	Patched versions
ecdsa-node starkbank	`= 1.1.2`	No fix yet
starkbank-ecdsa npm	`< 1.1.3`	`1.1.3`

Description

The verify function in the Stark Bank Node.js ECDSA library (ecdsa-node) 1.1.2 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

NVD description

The verify function in the Stark Bank Node.js ECDSA library (ecdsa-node) 1.1.2 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

References

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