CVE-2023-39404 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.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/13/2023
This vulnerability resides within the window management module of a system where certain application programming interfaces lack proper input parameter verification mechanisms. The flaw represents a classic case of insufficient validation where maliciously crafted parameters can bypass normal input sanitization checks. According to CWE-20, this corresponds to the weakness of "Improper Input Validation" which occurs when software does not properly validate input data, allowing potentially harmful data to be processed. The vulnerability specifically affects API endpoints responsible for window management operations, suggesting that the system processes user-supplied parameters without adequate filtering or sanitization before executing window-related commands.
The technical implementation of this vulnerability allows an attacker to manipulate input parameters sent to window management APIs, potentially triggering unintended system behavior. When these malformed parameters are processed, they can cause the system to enter an unstable state leading to forced device restarts. This represents a denial of service condition that could be exploited repeatedly to disrupt system availability. The exploitation requires minimal privileges since the vulnerability exists in API layer processing rather than requiring elevated system access. From an operational perspective, this vulnerability aligns with ATT&CK technique T1499.004 which covers "Toggle System Execution Flag" and can be classified as a system stability compromise. The restart condition indicates that the input validation failure results in memory corruption or execution flow disruption that forces the operating system to reboot as a protective mechanism.
The impact of successful exploitation extends beyond simple service disruption as device restarts can potentially lead to data loss, service interruption, and create opportunities for additional attacks. In environments where continuous operation is critical, such as industrial control systems or network infrastructure devices, this vulnerability presents a significant risk. The vulnerability's exploitation potential increases when considering that window management APIs are typically accessible to various system components and user applications. Organizations should implement immediate mitigations including input parameter validation enforcement, API endpoint rate limiting, and comprehensive logging of window management API calls to detect anomalous behavior patterns. Network segmentation and access control measures can help limit the scope of potential exploitation while monitoring solutions should be configured to alert on unusual restart patterns or API access anomalies. The vulnerability demonstrates the importance of defense-in-depth strategies where multiple layers of validation and monitoring work together to prevent exploitation of input validation flaws that could compromise system stability and availability.