Improper Verification of Cryptographic Signature in starkbank-ecdsa

GHSA-j3jw-j2j8-2wv9 · CVE-2021-43569

Published Nov 10, 2021 · Modified Feb 17, 2024

Description

The verify function in the Stark Bank .NET ECDSA library (ecdsa-dotnet) 1.3.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-43569
PACKAGE https://github.com/starkbank/ecdsa-dotnet
WEB https://github.com/starkbank/ecdsa-dotnet/releases/tag/v1.3.2
WEB https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries

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