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Improper Verification of Cryptographic Signature in starkbank-ecdsa

Critical severity GitHub Reviewed Published Nov 10, 2021 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

nuget starkbank-ecdsa (NuGet)

Affected versions

< 1.3.2

Patched versions

1.3.2

Description

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.

References

Published by the National Vulnerability Database Nov 9, 2021
Reviewed Nov 10, 2021
Published to the GitHub Advisory Database Nov 10, 2021
Last updated Feb 1, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

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

Weaknesses

CVE ID

CVE-2021-43569

GHSA ID

GHSA-j3jw-j2j8-2wv9

Source code

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