CVE-2021-42027 : Vulnerability Insights and Analysis
Discover the CVE-2021-42027 vulnerability in SINUMERIK Edge by Siemens allowing attackers to interfere in TLS communication by spoofing trusted entities. Learn about the impact and mitigation steps.
A vulnerability has been identified in SINUMERIK Edge by Siemens, allowing an attacker to spoof a trusted entity by interfering in the TLS communication path.
Understanding CVE-2021-42027
This CVE involves improper certificate validation in SINUMERIK Edge versions below V3.2.
What is CVE-2021-42027?
The vulnerability in SINUMERIK Edge (all versions < V3.2) arises from the software failing to validate the server certificate during TLS connection initiation.
The Impact of CVE-2021-42027
The vulnerability allows attackers to impersonate trusted entities by disrupting the client-server communication flow.
Technical Details of CVE-2021-42027
This section covers specific technical aspects of the vulnerability.
Vulnerability Description
- Vulnerability: Improper Certificate Validation in SINUMERIK Edge
Affected Systems and Versions
- Product: SINUMERIK Edge
- Vendor: Siemens
- Affected Versions: All versions < V3.2
Exploitation Mechanism
- Attackers exploit the lack of certificate validation to manipulate the communication channel between client and server.
Mitigation and Prevention
Steps to address and prevent exploitation of the vulnerability.
Immediate Steps to Take
- Upgrade affected systems to version V3.2 or newer
- Implement strict certificate validation checks
- Monitor network traffic for unusual patterns
Long-Term Security Practices
- Regular security training for staff on identifying phishing attempts
- Conducting penetration testing on systems to identify vulnerabilities
Patching and Updates
- Apply security patches provided by Siemens promptly