CVE-2019-10914 : Exploit Details and Defense Strategies

In MatrixSSL 4.0.1 Open, a stack-based buffer overflow vulnerability exists in the pubRsaDecryptSignedElementExt function, impacting the Inside Secure TLS Toolkit.

Understanding CVE-2019-10914

This CVE involves a critical security flaw in MatrixSSL 4.0.1 Open, leading to a stack-based buffer overflow vulnerability.

What is CVE-2019-10914?

The vulnerability arises from the lack of validation in the psRsaDecryptPubExt function within the rsa_pub.c file during X.509 certificate verification.

The Impact of CVE-2019-10914

The vulnerability could be exploited by attackers to execute arbitrary code or cause a denial of service (DoS) condition on affected systems.

Technical Details of CVE-2019-10914

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The issue is a stack-based buffer overflow in the pubRsaDecryptSignedElementExt function within MatrixSSL 4.0.1 Open, used in the Inside Secure TLS Toolkit.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: All versions are affected

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to trigger the buffer overflow during X.509 certificate verification, potentially leading to unauthorized code execution.

Mitigation and Prevention

Protecting systems from CVE-2019-10914 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate risks.
Educate users and IT staff on best practices for secure coding and system configuration.
Employ intrusion detection and prevention systems to enhance security posture.

Patching and Updates

Ensure that the affected systems are updated with the latest patches and security fixes to mitigate the risk of exploitation.