CVE-2025-20632 in MT7615
Summary
by MITRE • 02/03/2025
In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00397139; Issue ID: MSV-2188.
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Analysis
by VulDB Data Team • 02/03/2025
The vulnerability identified as CVE-2025-20632 represents a critical out-of-bounds write flaw within the wireless local area network access point driver component. This issue resides in the kernel-level driver code responsible for managing wireless network communications, specifically affecting the wlan AP driver implementation. The vulnerability stems from an improper bounds checking mechanism that fails to adequately validate array indices or buffer limits before writing data, creating a potential pathway for malicious code execution.
The technical nature of this flaw places it squarely within the CWE-129 category of "Improper Validation of Array Index" and aligns with CWE-787 "Out-of-bounds Write" as a direct consequence. The vulnerability manifests when the driver processes incoming wireless frames or configuration data that contains malformed array indices, causing the system to write data beyond the allocated memory boundaries. This memory corruption can occur during normal operation when legitimate wireless traffic is processed, making the attack vector particularly insidious as it requires no user interaction or additional privileges for exploitation.
From an operational perspective, this vulnerability presents a significant risk for local privilege escalation attacks, where an attacker with minimal system access could leverage this flaw to gain elevated privileges without requiring additional execution privileges. The absence of user interaction requirements makes this particularly dangerous in environments where wireless access points are exposed to untrusted networks or where attackers might have limited initial access to the system. The exploitation process would likely involve crafting specific wireless packets that trigger the faulty bounds checking logic, potentially leading to system compromise or denial of service conditions.
The patch ID WCNCR00397139 and issue ID MSV-2188 indicate this vulnerability was addressed through a targeted driver update that corrects the bounds validation logic and implements proper input sanitization. Organizations should prioritize applying this patch across all affected wireless access point deployments, particularly in environments where wireless infrastructure is critical to operations. The ATT&CK framework categorizes this vulnerability under T1068 "Exploitation for Privilege Escalation" and potentially T1566 "Phishing" if exploitation occurs through wireless network attacks. Network administrators should also implement monitoring for unusual wireless traffic patterns and consider segmenting wireless networks to limit potential attack surfaces. The vulnerability highlights the importance of robust input validation in kernel drivers and demonstrates how seemingly minor bounds checking errors can lead to significant security implications in wireless infrastructure components.