CVE-2017-6411 in DSL-2730U C1
Summary
by MITRE
Cross Site Request Forgery (CSRF) on D-Link DSL-2730U C1 IN_1.00 devices allows remote attackers to change the DNS or firewall configuration or any password.
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Analysis
by VulDB Data Team • 08/31/2024
The CVE-2017-6411 vulnerability represents a critical cross site request forgery flaw affecting D-Link DSL-2730U C1 IN_1.00 wireless routers, demonstrating a fundamental weakness in web application security controls that enables unauthorized remote configuration changes. This vulnerability falls under the CWE-352 category, specifically addressing cross site request forgery issues where the web application fails to validate the origin of requests, allowing attackers to manipulate router settings through crafted malicious requests. The affected device operates with a web-based management interface that lacks proper anti-CSRF token implementation, creating a pathway for remote exploitation without authentication.
The technical flaw stems from the router's web interface failing to implement robust CSRF protection mechanisms, particularly the absence of anti-CSRF tokens in critical configuration endpoints. When legitimate users interact with the router's management interface, the system should validate that requests originate from authenticated sessions and match the expected token values. However, the D-Link DSL-2730U C1 IN_1.00 firmware does not enforce this validation, allowing attackers to construct malicious requests that appear to originate from authenticated users. This vulnerability operates at the application layer and directly impacts the router's security posture by enabling remote attackers to execute arbitrary configuration changes through specially crafted HTTP requests.
The operational impact of this vulnerability extends far beyond simple configuration changes, as it provides attackers with complete administrative control over the affected network infrastructure. Remote attackers can modify DNS settings to redirect traffic to malicious servers, alter firewall rules to allow unauthorized network access, or change administrative passwords to lock out legitimate users. This comprehensive control over network security settings aligns with ATT&CK technique T1072 for Application Deployment Software and T1566 for Phishing, as attackers can leverage this vulnerability to establish persistent network access or redirect network traffic. The vulnerability's remote exploitation capability means that attackers do not require physical access or network proximity to compromise the device, making it particularly dangerous in enterprise and home network environments.
Mitigation strategies for CVE-2017-6411 should focus on immediate firmware updates from D-Link, as the vendor has released patches addressing this specific CSRF vulnerability. Network administrators should implement additional security controls including network segmentation to isolate critical devices, disable unnecessary web management interfaces, and deploy intrusion detection systems to monitor for suspicious HTTP requests targeting router management interfaces. The implementation of proper anti-CSRF token mechanisms, as recommended by OWASP and NIST guidelines, should be enforced in all web applications handling sensitive configuration changes. Organizations should also consider implementing network access control measures and regular vulnerability assessments to identify similar weaknesses in other network devices, as this vulnerability demonstrates the importance of validating request origins and implementing robust session management controls across all network infrastructure components.