In short
- CVE-2021-43572 is a CRITICAL (CVSS 9.8) vulnerability affecting starkbank-ecdsa, ecdsa-python (starkbank).
- Chance of exploitation in the next 30 days (EPSS): 1.2%, higher than 69.5% of all vulnerabilities.
- Fix: update to 2.0.1 or later.
Description
The verify function in the Stark Bank Python ECDSA library (starkbank-ecdsa) 2.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.
NVD description
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.
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