CVE-2019-18937 : Vulnerability Insights and Analysis
Learn about CVE-2019-18937 affecting eQ-3 Homematic CCU2 and CCU3 devices, allowing remote code execution without authentication. Find mitigation steps and best practices for enhanced security.
The eQ-3 Homematic CCU2 version 2.47.20 and CCU3 version 3.47.18, with the Script Parser AddOn up to version 1.8, contain a security vulnerability that allows remote code execution.
Understanding CVE-2019-18937
This CVE identifies a critical vulnerability in eQ-3 Homematic CCU2 and CCU3 devices that can be exploited by attackers to execute code remotely without authentication.
What is CVE-2019-18937?
The vulnerability in eQ-3 Homematic CCU2 and CCU3 devices allows attackers to execute TCL script content received from an HTTP POST request through the exec.cgi script without requiring authentication.
The Impact of CVE-2019-18937
The security flaw enables remote attackers to execute arbitrary code on the affected devices, potentially leading to unauthorized access, data theft, or further compromise of the system.
Technical Details of CVE-2019-18937
The technical aspects of the vulnerability are as follows:
Vulnerability Description
- Vulnerable Versions: eQ-3 Homematic CCU2 version 2.47.20 and CCU3 version 3.47.18 with Script Parser AddOn up to version 1.8
- Attack Vector: Remote
- Attack Complexity: Low
- Privileges Required: None
Affected Systems and Versions
- eQ-3 Homematic CCU2 version 2.47.20
- eQ-3 Homematic CCU3 version 3.47.18
- Script Parser AddOn up to version 1.8
Exploitation Mechanism
The vulnerability can be exploited by attackers with access to the web interface through the exec.cgi script, allowing them to execute malicious TCL script content.
Mitigation and Prevention
To address CVE-2019-18937, follow these mitigation steps:
Immediate Steps to Take
- Disable access to the web interface if not required
- Apply the latest security patches provided by the vendor
- Monitor network traffic for any suspicious activity
Long-Term Security Practices
- Regularly update firmware and software to the latest versions
- Implement network segmentation to limit the impact of potential attacks
- Conduct security assessments and penetration testing periodically
Patching and Updates
- Check for security advisories from the vendor
- Apply patches promptly to fix the vulnerability and enhance system security