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The CVE-2025-66329 vulnerability resides within the window management module of Huawei’s software stack, specifically in the permission verification mechanisms for window operations. This module handles graphical user interface elements such as window creation, destruction, and property management. The flaw allows a local attacker, without any privileges or user interaction, to bypass intended access controls by sending crafted requests to the window manager service. These requests, which could involve malformed commands or invalid parameters, exploit insufficient permission checks during the processing of window management functions. When the window manager receives such a request, it fails to validate the sender’s authorization correctly, leading to an error condition that can crash the service or cause it to become unresponsive. This results in a denial of service, affecting the availability of the graphical shell and making the device difficult to operate. The attack vector is local, meaning the attacker must execute code on the target device, often through a malicious application. The vulnerability is classified as medium severity due to its limited impact on availability and the requirement for local access. The window management service, once crashed, may require a system restart or service reboot to recover, disrupting user sessions. The core issue is a logical bug in the permission check routine, where certain request paths do not enforce security policies, allowing unauthorized processes to manipulate window states. Exploitation does not compromise data confidentiality or integrity but can stabilize a system’s usability. The vulnerability is indicative of a missing authorization safeguard in the module’s API handling, where requests from untrusted sources are not adequately filtered. Successful exploitation demonstrates a weakness in the isolation between user applications and system services, highlighting the need for robust input validation and permission enforcement in window management subsystems.
Platform: Huawei
Version: Various versions
Vulnerability: Permission control flaw
Severity: Medium
date: 12/08/2025
Prediction: Patch expected Q1-2026
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ps aux | grep windowmanager logcat | grep WindowManager dumpsys window | grep -i error adb shell service list | grep window pm list packages | grep huawei
// Hypothetical code to send crafted window request
int exploit_window_manager() {
// Bypass permission check via intent
send_broadcast( MALICIOUS_WINDOW_ACTION );
return 0;
}
How Exploit:
Local attacker executes malicious app, crafts request to window manager, bypasses permission check, triggers service crash, denies GUI availability.
Protection from this CVE
Apply Huawei security patches, restrict local app installations, monitor window service logs, use least privilege principles.
Impact:
Denial of service, reduced system availability, no data compromise.
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Sources:
Reported By: nvd.nist.gov
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