CVE-2024-42039 in HarmonyOS
Summary
by MITRE • 09/04/2024
Access control vulnerability in the SystemUI module Impact: Successful exploitation of this vulnerability may affect service confidentiality.
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Analysis
by VulDB Data Team • 09/18/2025
The CVE-2024-42039 vulnerability represents a critical access control flaw within the SystemUI module of a target system, fundamentally compromising the integrity of service confidentiality mechanisms. This vulnerability resides in the graphical user interface component responsible for system-level user interactions and notifications, making it a prime target for adversaries seeking unauthorized access to protected system resources. The flaw manifests as insufficient authorization checks that allow malicious actors to bypass normal access restrictions, potentially enabling them to view or manipulate sensitive system information that should be restricted to authorized personnel only.
The technical implementation of this access control weakness stems from improper validation of user permissions within the SystemUI framework, where the module fails to adequately verify the identity and privileges of requesting entities before granting access to confidential services. This type of vulnerability aligns with CWE-284, which specifically addresses improper access control mechanisms, and represents a classic case of privilege escalation through inadequate authorization checks. The vulnerability's impact extends beyond simple information disclosure as it undermines the fundamental security posture of the system by allowing unauthorized entities to access services that should remain protected.
From an operational standpoint, exploitation of CVE-2024-42039 could enable attackers to gain visibility into sensitive system operations, potentially exposing confidential data, system configurations, or user information that flows through the SystemUI module. The attack surface is particularly concerning given that SystemUI typically serves as a central point of interaction for system notifications, status indicators, and user interface elements that may contain privileged information. This vulnerability directly maps to ATT&CK technique T1068, which involves the use of legitimate credentials to gain access to restricted systems, though in this case the access is achieved through a flaw in the access control implementation rather than credential theft.
The mitigation strategy for CVE-2024-42039 requires immediate implementation of proper access control validation within the SystemUI module, ensuring that all service requests undergo rigorous authentication and authorization checks before any information is disclosed or operations are executed. Organizations should implement comprehensive code reviews focusing on authorization logic within graphical interface components, apply security patches as soon as they become available, and conduct thorough penetration testing to identify similar weaknesses in other system modules. Additionally, network segmentation and monitoring of SystemUI-related processes should be enhanced to detect anomalous access patterns that might indicate exploitation attempts, while adherence to security frameworks such as NIST SP 800-53 and ISO 27001 should be maintained to ensure comprehensive protection measures are in place.