Vulnerability in Starkbank Ecdsa-Python
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, which allows attackers to forge signatures on arbitrary messages.
EPSS: 0.012 (65.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Starkbank Ecdsa-python
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-43572?
- CVE-2021-43572 is a critical-severity vulnerability in Starkbank Ecdsa-Python, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2021-11-09.
- How severe is CVE-2021-43572?
- Critical severity. CVSS v3 base score is 9.8 out of 10.