Main Vulnerability Database Vulnerabilities #VU64732

Improper Verification of Cryptographic Signature in ecdsa-dotnet - CVE-2021-43569

Published: June 28, 2022

Vulnerability identifier: #VU64732

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-43569

CWE-ID: CWE-347

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to verify function in the Stark Bank .NET ECDSA library (ecdsa-dotnet) fails to check that the signature is non-zero. A remote unauthenticated attacker can forge signatures on arbitrary messages to execute arbitrary code on the target system.

Affected software

ecdsa-dotnet
IBM Robotic Process Automation

How to mitigate CVE-2021-43569

Install updates from vendor's website.

ecdsa-dotnet - update to 1.3.2
IBM Robotic Process Automation - update to 21.0.1.5

External References

Related Security Bulletins