CVE-2021-43572

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

The verify function in the Stark Bank Python ECDSA library (aka starkbank-escada or ecdsa-python) before 2.0.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-347

Affected software

No affected versions have been published.

Timeline

Published: Nov 9, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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