Improper Verification of Cryptographic Signature Affecting starkbank-ecdsa package, versions [,1.3.2)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.22% (45th percentile)

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  • Snyk IDSNYK-DOTNET-STARKBANKECDSA-1915558
  • published11 Nov 2021
  • disclosed10 Nov 2021
  • creditUnknown

Introduced: 10 Nov 2021

CVE-2021-43569  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade starkbank-ecdsa to version 1.3.2 or higher.

Overview

starkbank-ecdsa is a C# implementation of the Elliptic Curve Digital Signature Algorithm (ECDSA) by Stark Bank.

Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the verify function that fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

References

CVSS Base Scores

version 3.1