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CVE-2021-43569 — Vulnerability in starkbank-ecdsa — CVE Details

CRITICAL

Improper Verification of Cryptographic Signature in starkbank-ecdsa

Published November 10, 2021Updated February 17, 2024Source: osv

Summary

The verify function in the Stark Bank .NET ECDSA library (ecdsa-dotnet) 1.3.1 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Advisory Timeline

  • First published November 10, 2021 (1797 days ago).
  • Last revised February 17, 2024 — 828 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update starkbank-ecdsa to 1.3.2 or later
dotnet add package starkbank-ecdsa --version 1.3.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

PackageEcosystemAffectedFixed In
starkbank-ecdsa
nuget
0.0.1, 1.0.0, 1.1.0, 1.2.0 (+3 more)1.3.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-347
    Improper Verification of Cryptographic SignatureMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2021-43569?
Improper Verification of Cryptographic Signature in starkbank-ecdsa This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2021-43569?
CVE-2021-43569 affects starkbank-ecdsa. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2021-43569 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-j3jw-j2j8-2wv9

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