CVE-2019-13101 in DIR-600M
Summary
by MITRE
An issue was discovered on D-Link DIR-600M 3.02, 3.03, 3.04, and 3.06 devices. wan.htm can be accessed directly without authentication, which can lead to disclosure of information about the WAN, and can also be leveraged by an attacker to modify the data fields of the page.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/21/2024
The vulnerability identified as CVE-2019-13101 affects D-Link DIR-600M routers running firmware versions 3.02, 3.03, 3.04, and 3.06. This represents a critical authentication bypass flaw that undermines the fundamental security posture of the device. The issue stems from the improper access control implementation within the web-based management interface, specifically targeting the wan.htm page which handles Wide Area Network configuration parameters. The vulnerability resides in the router's web server implementation where it fails to properly validate user credentials before granting access to sensitive administrative pages.
This authentication bypass vulnerability operates through a direct access vector that allows unauthenticated users to navigate directly to the wan.htm management page. The flaw enables attackers to bypass the standard authentication mechanisms that should normally protect administrative interfaces. When an attacker accesses this page directly, they can view sensitive WAN configuration information including IP addresses, subnet masks, gateway addresses, and DNS server settings. The vulnerability also permits modification of WAN parameters, potentially allowing attackers to redirect network traffic, change routing configurations, or establish malicious network connections.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass active network manipulation capabilities. Attackers can leverage this flaw to perform man-in-the-middle attacks, redirect traffic to malicious servers, or compromise the entire network routing infrastructure. The affected D-Link DIR-600M devices are commonly deployed in residential and small office environments, making them attractive targets for attackers seeking to establish persistent network footholds. This vulnerability directly violates the principle of least privilege and demonstrates poor implementation of access control mechanisms that should be fundamental to network device security.
The technical implementation of this vulnerability aligns with CWE-284, which describes improper access control in software systems. This weakness allows unauthorized users to access resources that should be protected, creating potential for both information disclosure and system compromise. From an adversarial perspective, this vulnerability maps to multiple ATT&CK techniques including T1071.004 for application layer protocol usage and T1046 for network service scanning. The vulnerability represents a classic case of insufficient authentication checks where the web application fails to properly validate session state or user credentials before rendering sensitive administrative content.
Mitigation strategies should focus on immediate firmware updates from D-Link to address the authentication bypass vulnerability. Network administrators should implement network segmentation to limit access to administrative interfaces and consider disabling remote management entirely if not required. Additional protective measures include implementing strong access controls on network devices, regularly monitoring for unauthorized administrative access attempts, and conducting thorough security assessments of network infrastructure. The vulnerability underscores the critical importance of proper authentication implementation in network devices and serves as a reminder of the potential consequences when access control mechanisms fail to properly validate user credentials. Organizations should also consider implementing network monitoring solutions to detect unauthorized access attempts to administrative interfaces and establish robust patch management processes to ensure timely remediation of known vulnerabilities.