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.
CVSS 3.1CRITICAL 9.8·Network·No auth·No interaction·EPSS 0.01056·Published 2021-11-09·Fixed in 1.3.2CWE-347