Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1qM2p3LWoyajgtMnd2Oc0XJg

Improper Verification of Cryptographic Signature in starkbank-ecdsa

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.

Permalink: https://github.com/advisories/GHSA-j3jw-j2j8-2wv9
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1qM2p3LWoyajgtMnd2Oc0XJg
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: over 1 year ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-j3jw-j2j8-2wv9, CVE-2021-43569
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-43569
• https://github.com/starkbank/ecdsa-dotnet/releases/tag/v1.3.2
• https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/
• https://github.com/advisories/GHSA-j3jw-j2j8-2wv9

Repository: https://github.com/starkbank/ecdsa-dotnet
Blast Radius: 24.3

Affected Packages