CVE-2019-11891 Explained : Impact and Mitigation

A potential vulnerability in the app pairing process of the Bosch Smart Home Controller (SHC) before version 9.8.905 could lead to an unauthorized elevation of privileges if exploited by an attacker with physical access to the SHC.

Understanding CVE-2019-11891

This CVE involves an incorrect privilege assignment in the app pairing mechanism of the Bosch Smart Home Controller.

What is CVE-2019-11891?

The vulnerability in the Bosch Smart Home Controller (SHC) app pairing process before version 9.8.905 could allow an attacker to gain unauthorized elevated privileges if they have physical access to the SHC during the attack.

The Impact of CVE-2019-11891

CVSS Base Score: 8.0 (High)
Attack Vector: Adjacent Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2019-11891

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability involves an incorrect privilege assignment in the app pairing mechanism of the Bosch Smart Home Controller (SHC) before version 9.8.905.

Affected Systems and Versions

Affected Product: Smart Home Controller
Vendor: Bosch
Affected Version: < 9.8.905 (unspecified, custom version)

Exploitation Mechanism

The vulnerability can be exploited by an attacker with physical access to the SHC during the app pairing process.

Mitigation and Prevention

Protecting systems from CVE-2019-11891 is crucial to prevent unauthorized privilege escalation.

Immediate Steps to Take

Update the Bosch Smart Home Controller to version 9.8.905 or higher.
Restrict physical access to the SHC to authorized personnel only.

Long-Term Security Practices

Implement strong access control measures.
Regularly monitor and audit privilege assignments.

Patching and Updates

Apply security patches and updates provided by Bosch to address this vulnerability.