CVE-2023-39390 in EMUI
Summary
by MITRE • 08/13/2023
Vulnerability of input parameter verification in certain APIs in the window management module. Successful exploitation of this vulnerability may cause the device to restart.
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Analysis
by VulDB Data Team • 09/08/2023
The vulnerability identified as CVE-2023-39390 represents a critical weakness in the input parameter validation mechanisms within the window management module of affected systems. This flaw resides in the API layer where user-supplied parameters are processed without adequate verification, creating an avenue for malicious actors to manipulate the system behavior through crafted inputs. The window management module typically handles graphical user interface operations, window positioning, sizing, and other display-related functions that are fundamental to system operation and user interaction. When parameters fail proper validation, they can trigger unexpected system states that lead to unintended consequences including device restarts.
The technical implementation of this vulnerability stems from insufficient input sanitization and validation routines within the affected APIs. Attackers can exploit this weakness by submitting malformed or specially crafted parameters that bypass normal input checks, potentially causing the system to interpret these inputs as legitimate commands. The specific nature of the vulnerability suggests that the system does not adequately validate parameter boundaries, data types, or expected values before processing window management operations. This lack of proper parameter verification creates a pathway for exploitation that can result in unauthorized system restarts, effectively disrupting service availability and potentially creating denial of service conditions.
The operational impact of this vulnerability extends beyond simple system disruption as it can be leveraged to create persistent availability issues for end users. When devices restart unexpectedly, users lose their current work context, applications may crash, and system stability is compromised. The vulnerability particularly affects systems where window management operations are frequently accessed, such as desktop environments, mobile platforms, or embedded systems with graphical interfaces. The restart capability provides attackers with a means to maintain persistent access or to disrupt normal operations repeatedly, making this vulnerability particularly concerning for environments where continuous operation is critical.
From a cybersecurity perspective, this vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness in software systems. The flaw also relates to ATT&CK technique T1490, which covers Data Destruction, as the device restart functionality can be interpreted as a form of system disruption that impacts availability. Mitigation strategies should focus on implementing robust input validation controls including parameter type checking, boundary validation, and sanitization routines. System administrators should apply vendor-provided patches immediately and consider implementing additional monitoring for unusual restart patterns or API access anomalies. Network segmentation and access controls can help limit the potential impact of exploitation while proper logging and audit trails should be established to detect unauthorized parameter manipulation attempts.