Critical severity9.8NVD Advisory· Published Nov 9, 2021· Updated Jun 17, 2026
CVE-2021-43568
CVE-2021-43568
Description
The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 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 |
|---|---|---|
ecdsa-elixirHex | >= 1.0.0, < 1.0.1 | 1.0.1 |
Affected products
3- cpe:2.3:a:starkbank:elixir_ecdsa:1.0.0:*:*:*:*:*:*:*
- Stark Bank Elixir/ecdsa-elixirdescription
Patches
Vulnerability mechanics
References
7- research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/nvdExploitThird Party Advisory
- github.com/advisories/GHSA-xx36-6rv4-gj8rghsaADVISORY
- github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1nvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-43568ghsaADVISORY
- github.com/starkbank/ecdsa-elixir/commit/4b960e26768bb698f449eb7686b5664936b70b61ghsaWEB
- github.com/starkbank/ecdsa-elixir/commit/a5168f6d9cfbe0a0a62d92e2e9b1a97235d90343ghsaWEB
- research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-librariesghsaWEB
News mentions
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