CVE-2025-9336 in Armoury Crate
Summary
by MITRE • 10/13/2025
A stack buffer overflow has been identified in the AsIO3.sys driver. This vulnerability can be triggered by input manipulation, may leading to a system crash (BSOD) or other potentially undefined execution. Refer to the 'Security Update for Armoury Crate App' section on the ASUS Security Advisory for more information.
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Analysis
by VulDB Data Team • 10/13/2025
The vulnerability identified as CVE-2025-9336 represents a critical stack buffer overflow within the AsIO3.sys driver component of ASUS Armoury Crate software. This driver operates at kernel level within the Windows operating system, making it a prime target for privilege escalation attacks and system compromise. The flaw manifests when the driver processes malformed input data through its input validation mechanisms, creating a condition where user-supplied data can overwrite adjacent memory locations on the stack. Such buffer overflow conditions typically occur when the driver fails to properly validate input length or perform bounds checking before copying data into fixed-size stack buffers. The vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a high-risk weakness due to its potential for arbitrary code execution and system instability.
The operational impact of this vulnerability extends beyond simple system crashes, as the stack buffer overflow can potentially lead to complete system compromise through various attack vectors. When exploited, the vulnerability may cause bluescreen of death (BSOD) conditions that halt system operations, but more concerning is the potential for privilege escalation attacks that could allow attackers to execute code with kernel-level privileges. Attackers could manipulate the driver through specially crafted inputs that trigger the buffer overflow, potentially leading to remote code execution or local privilege escalation. The nature of kernel-mode drivers means that successful exploitation could result in complete system compromise without requiring user interaction or elevated privileges. This vulnerability directly aligns with ATT&CK technique T1068, which covers 'Local Privilege Escalation' through kernel exploits and driver vulnerabilities.
Mitigation strategies for CVE-2025-9336 should prioritize immediate patching of the ASUS Armoury Crate application through the official security update referenced in the ASUS Security Advisory. System administrators should implement monitoring for abnormal driver behavior and unexpected BSOD events that may indicate exploitation attempts. The vulnerability's kernel-level nature necessitates comprehensive system hardening measures including driver signature enforcement, secure boot configuration, and regular security audits of installed drivers. Organizations should also consider implementing network segmentation and access controls to limit potential attack surfaces. Additionally, security teams should monitor for indicators of compromise such as unusual driver loading patterns, unexpected system reboots, or abnormal memory usage patterns that could signal exploitation attempts. The vulnerability demonstrates the importance of proper input validation and memory management in kernel-mode drivers, aligning with security best practices outlined in the OWASP Secure Coding Guidelines and Microsoft's Secure Coding Standards for driver development.