by Kastro
Paper/Archive/CVE-2021-43572

CVE-2021-43572

mitre — 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 si…

EPSS 1%CVSS 9.8
critical.is priorityof 100
43
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 69.4.694 × 2013.9No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refresearch.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-librariesrefgithub.com/starkbank/ecdsa-python/releases/tag/v2.0.1refgithub.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f