CVE-2025-20654

Remediation / Mitigation Strategy: CVE-2025-20654

  • Vulnerability Description: Out-of-bounds write in MediaTek WLAN service due to an incorrect bounds check.

  • Severity: Critical (CVSS v3.x Score: 9.8)

  • Known Exploit: Remote Code Execution (RCE) with no additional execution privileges required. User interaction is NOT needed for exploitation.

  • Affected Component: MediaTek WLAN Service.

  • Affected Systems: Devices using vulnerable MediaTek WLAN chipsets.

  • Remediation:

    1. Apply Patch: Immediately apply the security patch WCNCR00406897 provided by MediaTek. Contact your device manufacturer for specific instructions on how to apply this patch.

    2. Vendor Updates: Monitor your device manufacturer’s website or update channel for firmware updates that include the necessary patch. Prioritize and promptly install these updates.

  • Mitigation (If Patching is Not Immediately Possible):

    1. Disable WLAN: As a temporary measure, consider disabling the WLAN/Wi-Fi functionality on affected devices, although this significantly reduces functionality.

    2. Network Segmentation: Isolate potentially vulnerable devices on a separate network segment with strict access controls. Limit their exposure to untrusted networks.

    3. Intrusion Detection/Prevention Systems (IDS/IPS): Deploy network-based IDS/IPS solutions to detect and potentially block exploit attempts targeting this vulnerability. Configure these systems to specifically monitor for suspicious network traffic associated with WLAN vulnerabilities.

    4. Traffic Monitoring: Implement network traffic monitoring to analyze WLAN traffic patterns for any anomalies that could indicate an exploitation attempt.

  • Long-Term Prevention:

    1. Regular Security Audits: Conduct regular security audits of devices incorporating MediaTek WLAN chipsets to identify and address potential vulnerabilities proactively.

    2. Secure Development Practices: Promote secure coding practices in WLAN service development, with a strong emphasis on input validation, bounds checking, and memory management.

    3. Vulnerability Disclosure Program: Encourage responsible vulnerability disclosure by implementing a clear and effective vulnerability disclosure program.

  • Verification:

    1. Patch Verification: After applying the patch, verify that the system is no longer vulnerable by performing a penetration test or vulnerability scan using tools that specifically check for CVE-2025-20654.
    2. Functional Testing: After applying the patch, conduct thorough testing to ensure that the WLAN service functions correctly and that no new issues have been introduced.

Assigner

Date

  • Published Date: 2025-04-07 03:14:46
  • Updated Date: 2025-04-07 14:17:50

More Details

CVE-2025-20654