CVE-2019-11894 : Exploit Details and Defense Strategies

A potential improper access control vulnerability exists in the backup mechanism of the Bosch Smart Home Controller (SHC) before version 9.8.905, allowing unauthorized download of backups.

Understanding CVE-2019-11894

This CVE involves a security issue in the backup mechanism of the Bosch Smart Home Controller (SHC) that could lead to unauthorized access to backups.

What is CVE-2019-11894?

The vulnerability in the Bosch Smart Home Controller (SHC) before version 9.8.905 could be exploited by attackers to download backups without authorization.

The Impact of CVE-2019-11894

CVSS Base Score: 5.7 (Medium Severity)
Confidentiality Impact: High
Attack Vector: Adjacent Network
User Interaction: Required
Scope: Unchanged
The vulnerability could result in unauthorized access to sensitive data stored in the backups.

Technical Details of CVE-2019-11894

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue lies in how the backup mechanism of the Bosch Smart Home Controller (SHC) handles access control, potentially allowing unauthorized downloading of backups.

Affected Systems and Versions

Affected Product: Smart Home Controller
Vendor: Bosch
Vulnerable Versions: Before 9.8.905

Exploitation Mechanism

To exploit this vulnerability, the attacker needs to directly download the backup immediately after a legitimate user triggers a backup.

Mitigation and Prevention

Protect your systems from potential threats by following these mitigation strategies.

Immediate Steps to Take

Update the Bosch Smart Home Controller to version 9.8.905 or later.
Monitor backup activities for any suspicious behavior.

Long-Term Security Practices

Regularly review and update access control mechanisms.
Educate users on secure backup practices to prevent unauthorized access.

Patching and Updates

Stay informed about security updates and patches released by Bosch.