CVE-2020-6774 in Recording Station
Summary
by MITRE
Improper Access Control in the Kiosk Mode functionality of Bosch Recording Station allows a local unauthenticated attacker to escape from the Kiosk Mode and access the underlying operating system.
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Analysis
by VulDB Data Team • 10/19/2020
The vulnerability identified as CVE-2020-6774 represents a critical improper access control flaw within the Kiosk Mode functionality of Bosch Recording Station software. This issue affects the security boundaries designed to isolate user interactions from underlying system resources, creating a pathway for local attackers to bypass intended restrictions. The vulnerability specifically manifests in the kiosk mode implementation where the system fails to properly enforce access controls, allowing unauthorized users to escape the restricted environment and gain access to the underlying operating system components. This weakness directly violates the principle of least privilege and demonstrates a fundamental failure in the software's security architecture.
The technical implementation of this vulnerability stems from inadequate boundary enforcement within the kiosk mode subsystem. When users interact with the recording station in kiosk mode, the system should maintain strict separation between the restricted user interface and the underlying operating system. However, the flaw allows an attacker to exploit a weakness in the access control mechanisms, potentially through privilege escalation techniques or by leveraging system calls that should be restricted. The vulnerability is classified as a local attack vector, meaning that an attacker must already have access to the system to exploit it, but the impact is significant as it undermines the entire purpose of the kiosk mode security model. This weakness aligns with CWE-284 which addresses improper access control and represents a classic example of insufficient privilege checking in application security.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally compromises the security model of the entire recording station system. Organizations relying on Bosch Recording Station for surveillance or monitoring applications face potential exposure to unauthorized system access, data manipulation, and possible complete system compromise. The vulnerability undermines the trust model established by kiosk mode functionality, which is typically deployed to prevent unauthorized access to system configurations, logs, or other sensitive operational data. Attackers could potentially access system files, modify configuration settings, install malicious software, or extract sensitive information from the underlying operating system. This represents a serious concern for security-conscious deployments where the kiosk mode is specifically implemented to provide controlled access to surveillance systems.
Mitigation strategies for CVE-2020-6774 should focus on immediate software updates from Bosch to address the access control implementation flaws. Organizations should also implement network segmentation to limit local access to affected systems and establish monitoring for unauthorized access attempts. The vulnerability demonstrates the importance of proper input validation and access control enforcement in security-critical applications, aligning with ATT&CK technique T1068 which covers exploit for privilege escalation. Additional defensive measures include implementing least privilege principles for kiosk mode users, regular security assessments of kiosk applications, and maintaining updated security baselines for surveillance systems. System administrators should also consider disabling kiosk mode functionality if the underlying system cannot be immediately patched, as this represents a temporary but effective mitigation strategy. The vulnerability serves as a reminder that even restricted user environments require robust access control implementations to prevent unauthorized system access and maintain overall security posture.