Critical severityNVD Advisory· Published Nov 9, 2021· Updated Aug 4, 2024
CVE-2021-43572
CVE-2021-43572
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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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
starkbank-ecdsaPyPI | < 2.0.1 | 2.0.1 |
Affected products
2- Stark Bank Python/ecdsa-pythondescription
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-92vm-mxjf-jqf3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-43572ghsaADVISORY
- github.com/pypa/advisory-database/tree/main/vulns/starkbank-ecdsa/PYSEC-2021-426.yamlghsaWEB
- github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17fghsax_refsource_MISCWEB
- github.com/starkbank/ecdsa-python/releases/tag/v2.0.1ghsax_refsource_MISCWEB
- research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-librariesghsaWEB
- research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/mitrex_refsource_MISC
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