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VULNERABILITIES

CVE-2021-43568 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1 CVEThird Party Advisory
https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ CVEExploitThird Party Advisory
https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1 [email protected]Third Party Advisory
https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/ [email protected]ExploitThird Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-347Improper Verification of Cryptographic Signature[email protected]

Affected Products

ProductVersions
starkbank elixir ecdsa
1.0.0

CPE

  • cpe:2.3:a:starkbank:elixir_ecdsa:1.0.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-43568
NVD Published Date:
Nov 9, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-43568 Details - Not Deferred