Description
An authentication bypass vulnerability has been identified in certain DSL series routers, may allow remote attackers to gain unauthorized access into the affected system. Refer to the 'Security Update for DSL Series Router' section on the ASUS Security Advisory for more information.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-150354
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-150354, also known as CVE-2025-59367, is an authentication bypass vulnerability affecting certain ASUS DSL series routers. The CVSS (Common Vulnerability Scoring System) base score of 9.3 indicates a critical severity level. The CVSS vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N breaks down as follows:
- AV:N (Attack Vector: Network): The vulnerability is exploitable over the network.
- AC:L (Attack Complexity: Low): The attack requires minimal skill or resources.
- AT:N (Attack Technique: Network): The attack involves network-based techniques.
- PR:N (Privileges Required: None): No privileges are required to exploit the vulnerability.
- UI:N (User Interaction: None): No user interaction is required.
- VC:H (Vulnerability Confidentiality: High): The vulnerability significantly impacts confidentiality.
- VI:H (Vulnerability Integrity: High): The vulnerability significantly impacts integrity.
- VA:H (Vulnerability Availability: High): The vulnerability significantly impacts availability.
- SC:N (Scope Change: None): The vulnerability does not change the security scope.
- SI:N (Scope Integrity: None): The vulnerability does not affect the integrity of the security scope.
- SA:N (Scope Availability: None): The vulnerability does not affect the availability of the security scope.
Given these metrics, the vulnerability poses a significant risk to the affected systems, allowing unauthorized access and potential control over the routers.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector for this vulnerability is network-based, meaning attackers can exploit it remotely without needing physical access to the device. Potential exploitation methods include:
- Network Scanning: Attackers can scan for vulnerable routers on the internet.
- Credential Stuffing: Attackers may attempt to bypass authentication using known default credentials or brute-force attacks.
- Man-in-the-Middle (MitM) Attacks: Intercepting network traffic to exploit the vulnerability.
- Exploit Kits: Automated tools that can identify and exploit the vulnerability.
3. Affected Systems and Software Versions
The vulnerability affects the following ASUS DSL series routers:
- DSL-AC51: Versions before 1.1.2.3_1010
- DSL-AC750: Versions before 1.1.2.3_1010
- DSL-N16: Versions before 1.1.2.3_1010
Users of these routers should ensure their firmware is updated to at least version 1.1.2.3_1010 to mitigate the risk.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Firmware Update: Immediately update the router firmware to the latest version (1.1.2.3_1010 or higher).
- Network Segmentation: Isolate the router from critical network segments to limit potential damage.
- Strong Authentication: Implement strong, unique passwords and consider enabling two-factor authentication if available.
- Regular Monitoring: Monitor network traffic for unusual activity that may indicate an attempted exploit.
- Firewall Configuration: Configure firewalls to restrict access to the router's management interface.
5. Impact on European Cybersecurity Landscape
The vulnerability poses a significant threat to European cybersecurity, particularly for home users and small businesses that rely on these routers for internet connectivity. Unauthorized access to these devices can lead to data breaches, network compromise, and potential use in botnets or other malicious activities. The widespread use of these routers in Europe amplifies the potential impact, making it crucial for users to apply the necessary updates and mitigations.
6. Technical Details for Security Professionals
For security professionals, the following technical details are pertinent:
- Detection: Use network monitoring tools to detect unusual traffic patterns that may indicate an exploit attempt.
- Incident Response: Develop an incident response plan that includes steps for identifying compromised routers, isolating them, and applying patches.
- Patch Management: Ensure that all network devices, including routers, are included in the organization's patch management program.
- Security Awareness: Educate users on the importance of keeping firmware updated and the risks associated with using default credentials.
By addressing these points, security professionals can effectively manage the risk posed by EUVD-2025-150354 and ensure the security of their networks.
References
This comprehensive analysis should help cybersecurity experts understand the implications of EUVD-2025-150354 and take appropriate actions to mitigate the associated risks.