Critical severity9.8NVD Advisory· Published Nov 9, 2021· Updated Jun 17, 2026
CVE-2021-43571
CVE-2021-43571
Description
The verify function in the Stark Bank Node.js ECDSA library (ecdsa-node) 1.1.2 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.
AI Insight
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-ecdsanpm | < 1.1.3 | 1.1.3 |
Affected products
3- cpe:2.3:a:starkbank:ecdsa-node:1.1.2:*:*:*:*:*:*:*
- Stark Bank Node.js/ecdsa-nodedescription
Patches
Vulnerability mechanics
References
5- research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/nvdExploitThird Party Advisory
- github.com/advisories/GHSA-q9q6-f556-gpm7ghsaADVISORY
- github.com/starkbank/ecdsa-node/releases/tag/v1.1.3nvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-43571ghsaADVISORY
- research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-librariesghsaWEB
News mentions
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