EUVD-2025-16597

Comprehensive Technical Analysis of EUVD-2025-16597

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-16597 pertains to a flaw in the wlan AP driver, which allows for the injection of arbitrary packets due to a missing permission check. This vulnerability can lead to remote escalation of privilege without requiring additional execution privileges or user interaction. The severity of this vulnerability is rated with a CVSS Base Score of 9.8, indicating a critical risk.

CVSS Vector Breakdown:

• AV:N (Attack Vector: Network) - The vulnerability is exploitable over the network.
• AC:L (Attack Complexity: Low) - The attack requires low complexity to execute.
• PR:N (Privileges Required: None) - No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None) - No user interaction is needed for exploitation.
• S:U (Scope: Unchanged) - The vulnerability does not change the security scope.
• C:H (Confidentiality: High) - The vulnerability has a high impact on confidentiality.
• I:H (Integrity: High) - The vulnerability has a high impact on integrity.
• A:H (Availability: High) - The vulnerability has a high impact on availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Code Execution (RCE): An attacker could exploit this vulnerability to execute arbitrary code on the affected device.
• Denial of Service (DoS): The injection of malicious packets could lead to a denial of service, rendering the device unavailable.
• Data Exfiltration: Sensitive information could be exfiltrated through the injection of crafted packets.

Exploitation Methods:

• Packet Crafting: An attacker could craft specific packets designed to exploit the missing permission check in the wlan AP driver.
• Network Sniffing: By injecting packets, an attacker could intercept and manipulate network traffic, leading to data breaches.

3. Affected Systems and Software Versions

The vulnerability affects several MediaTek products, including:

• MT6890, MT6990, MT7915, MT7916, MT7981, MT7986, MT7990, MT7992, MT7993

Affected Software Versions:

• SDK release 7.6.7.2 and before
• OpenWrt 19.07, 21.02 (MT6890)
• OpenWrt 21.02, 23.05 (MT6990)

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Application: Apply the patch identified by Patch ID: WCNCR00413202 immediately.
• Network Segmentation: Isolate affected devices from critical network segments to limit potential damage.
• Monitoring: Implement enhanced monitoring for suspicious network activities, especially around affected devices.

Long-Term Strategies:

• Regular Updates: Ensure that all devices are regularly updated with the latest security patches.
• Access Control: Implement strict access controls and permission checks to mitigate similar vulnerabilities in the future.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security gaps.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using MediaTek products. The potential for remote escalation of privilege without user interaction makes it a critical concern for network security. The widespread use of MediaTek chips in various devices, including routers and IoT devices, amplifies the risk.

Potential Impacts:

• Data Breaches: Sensitive data could be compromised, leading to financial and reputational damage.
• Service Disruptions: Critical services relying on affected devices could face disruptions, impacting business operations.
• Regulatory Compliance: Organizations may face regulatory penalties for non-compliance with data protection laws such as GDPR.

6. Technical Details for Security Professionals

Vulnerability Details:

• CVE ID: CVE-2025-20674
• GHSA ID: GHSA-mxj6-x52w-4g7m
• Issue ID: MSV-3303

Technical References:

• NVD Reference: CVE-2025-20674
• MediaTek Security Bulletin: June 2025

Exploitation Steps:

1. Identify Target: Identify devices using the affected MediaTek chips and software versions.
2. Craft Packet: Create a malicious packet designed to exploit the missing permission check.
3. Inject Packet: Inject the crafted packet into the network targeting the vulnerable wlan AP driver.
4. Exploit: Gain remote escalation of privilege and execute arbitrary code or perform other malicious actions.

Detection and Response:

• Intrusion Detection Systems (IDS): Deploy IDS to detect unusual network activities indicative of packet injection.
• Log Analysis: Regularly analyze network logs for signs of unauthorized access or packet manipulation.
• Incident Response Plan: Develop and implement an incident response plan to quickly address and mitigate any detected exploitation attempts.

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their networks and data.