9.7 High
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
71.2%
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.
github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f
github.com/starkbank/ecdsa-python/releases/tag/v2.0.1
research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/