CVE-2021-43392 : Vulnerability Insights and Analysis

STMicroelectronics STSAFE-J, J-SAFE3, and J-SIGN have vulnerabilities that can expose cryptographic secrets, affecting specific product versions.

Understanding CVE-2021-43392

What is CVE-2021-43392?

STMicroelectronics products STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN have vulnerabilities allowing attackers to access cryptographic secrets related to the ECDSA signature algorithm on specific platforms.

The Impact of CVE-2021-43392

The vulnerability can be exploited on STSAFE-J in a closed configuration and J-SIGN (with signature verification) but not on J-SAFE3 EPASS BAC and EAC products. Other products based on the J-SAFE-3 Java Card platform might also be affected.

Technical Details of CVE-2021-43392

Vulnerability Description

The issue exposes the Java Card API 3.0.4 on STSAFE-J and J-SAFE3 platforms, making it possible for attackers to retrieve cryptographic secrets.

Affected Systems and Versions

Products: STSAFE-J 1.1.4, J-SAFE3 1.2.5, J-SIGN
Versions: not applicable

Exploitation Mechanism

The vulnerability allows attackers to obtain information on cryptographic secrets through the ECDSA signature algorithm on specific platforms.

Mitigation and Prevention

Immediate Steps to Take

Monitor vendor security advisories and apply patches promptly
Implement proper access controls to limit exposure of cryptographic secrets

Long-Term Security Practices

Conduct regular security assessments and code reviews
Enhance security awareness and training for developers

Patching and Updates

Apply security patches and updates provided by STMicroelectronics to address the vulnerability.