Vulnerability · Published Nov 9, 2021 · Assigned by mitre
CVE-2021-43569
Critical 9.8
In plain English
A critical-severity security flaw in the starkbank-ecdsa package (NuGet). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)1.1%top 35.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | starkbank-ecdsa | 1.3.2 | GHSA-j3jw-j2j8-2wv9 |