critical9.8
CVE-2021-43572
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, w…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Starkbank | Ecdsa-Python | before 2.0.1 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f
- https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1
- https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/
- https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f
- https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1
- https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/