CVE-2019-6821 Explained : Impact and Mitigation
Learn about CVE-2019-6821, a vulnerability in Modicon Controllers, Modicon M580 firmware versions, and other Modicon products. Discover the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability involving the use of insufficiently random values has been identified in Modicon Controllers, Modicon M580 firmware versions prior to V2.30, and all firmware versions of Modicon M340, Modicon Premium, and Modicon Quantum.
Understanding CVE-2019-6821
This CVE pertains to a specific vulnerability known as CWE-330, which can lead to the hijacking of TCP connections when Ethernet communication is utilized.
What is CVE-2019-6821?
The vulnerability in Modicon M580 firmware versions before V2.30 and other affected firmware versions allows for the potential hijacking of TCP connections during Ethernet communication.
The Impact of CVE-2019-6821
This vulnerability poses a risk of TCP connection hijacking, potentially leading to unauthorized access and control over affected systems.
Technical Details of CVE-2019-6821
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability involves the use of insufficiently random values, which can be exploited to hijack TCP connections.
Affected Systems and Versions
- Modicon Controllers
- Modicon M580 firmware versions prior to V2.30
- All firmware versions of Modicon M340, Modicon Premium, Modicon Quantum
Exploitation Mechanism
The vulnerability can be exploited to hijack TCP connections, particularly when Ethernet communication is in use.
Mitigation and Prevention
Protecting systems from CVE-2019-6821 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply security patches provided by the vendor
- Implement network segmentation to limit the impact of potential attacks
- Monitor network traffic for any suspicious activities
Long-Term Security Practices
- Regularly update firmware and software to address security vulnerabilities
- Conduct security assessments and penetration testing to identify and mitigate potential risks
- Educate users and administrators about secure practices to prevent exploitation
Patching and Updates
- Stay informed about security advisories and updates from the vendor
- Apply patches promptly to ensure systems are protected from known vulnerabilities