CVE-2018-7298 : Security Advisory and Response

On eQ-3 AG HomeMatic CCU2 2.29.22 devices, a vulnerability exists where software update packages are downloaded via the insecure HTTP protocol, allowing attackers to introduce malicious firmware updates.

Understanding CVE-2018-7298

What is CVE-2018-7298?

This CVE identifies a security flaw in eQ-3 AG HomeMatic CCU2 2.29.22 devices that enables attackers to compromise the system by injecting malicious firmware updates.

The Impact of CVE-2018-7298

The vulnerability allows attackers to compromise the entire system by introducing unauthorized firmware updates through the insecure software update download process.

Technical Details of CVE-2018-7298

Vulnerability Description

The issue lies in the insecure download of software update packages via the HTTP protocol, lacking cryptographic security, enabling attackers to introduce malicious firmware updates.

Affected Systems and Versions

Affected System: eQ-3 AG HomeMatic CCU2 2.29.22
Software Version: Not applicable

Exploitation Mechanism

Attackers can exploit this vulnerability by gaining a privileged network position, such as through DNS spoofing, to introduce malicious firmware updates.

Mitigation and Prevention

Immediate Steps to Take

Disable remote access to the CCU2 device to prevent unauthorized downloads.
Implement secure update mechanisms like HTTPS for firmware downloads.

Long-Term Security Practices

Regularly monitor for unauthorized changes in the system.
Conduct security assessments to identify and address vulnerabilities.

Patching and Updates

Apply patches provided by the vendor to secure the software update process.