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 (2)
Core 2
Core References
Exploit, Third Party Advisory x_refsource_misc
https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/
Third Party Advisory x_refsource_misc
https://github.com/starkbank/ecdsa-dotnet/releases/tag/v1.3.2
Scores
CVSS v3
9.8
EPSS
0.0022
EPSS Percentile
44.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-347
Status
published
Products (2)
nuget/starkbank-ecdsa
0 - 1.3.2NuGet
starkbank/ecdsa-dotnet
1.3.2
Published
Nov 09, 2021
Tracked Since
Feb 18, 2026