CVE-2019-17511 in DIR-412
Summary
by MITRE
There are some web interfaces without authentication requirements on D-Link DIR-412 A1-1.14WW routers. An attacker can get the router's log file via log_get.php, which could be used to discover the intranet network structure.
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Analysis
by VulDB Data Team • 01/08/2024
The vulnerability identified as CVE-2019-17511 affects D-Link DIR-412 routers running firmware version A1-1.14WW and potentially other models within the same product line. This represents a critical security flaw that exposes administrative web interfaces without proper authentication mechanisms, creating an unauthorized access vector that significantly compromises network security posture. The vulnerability specifically manifests through the log_get.php endpoint which lacks authentication requirements, allowing any remote attacker to access sensitive router log files that contain valuable network intelligence.
This weakness constitutes a direct violation of authentication security principles and falls under the CWE-287 category for improper authentication, specifically addressing the absence of proper access controls on web interfaces. The vulnerability enables attackers to perform reconnaissance activities by extracting router logs that typically contain network configuration details, IP address ranges, device names, and other information that reveals the internal network topology. The exposure of such information creates a significant risk for network enumeration and subsequent attack planning, as adversaries can map internal network structures without requiring legitimate credentials or physical access to the device.
The operational impact of this vulnerability extends beyond simple information disclosure, as the leaked network information can be leveraged for advanced persistent threat campaigns. Attackers can use the discovered network structure to identify potential targets for further exploitation, plan network-based attacks, or conduct social engineering operations that exploit the knowledge of internal network design. The presence of such unauthenticated access points on network infrastructure devices like routers represents a fundamental security failure that undermines the principle of least privilege and creates persistent attack surfaces that remain accessible until firmware updates are applied.
Security professionals should note that this vulnerability aligns with several ATT&CK techniques including T1046 for network service discovery and T1082 for system information discovery, as attackers can enumerate network components and gather system-level information without requiring elevated privileges. The lack of authentication controls on router web interfaces violates industry best practices established by frameworks such as NIST SP 800-53 and ISO 27001, which mandate proper access control mechanisms for all network devices. Organizations should implement immediate network segmentation, disable unnecessary web interfaces, and ensure firmware updates are deployed promptly to remediate this vulnerability. The exposure of router logs through unauthenticated endpoints represents a clear violation of network security policies and requires immediate attention to prevent potential exploitation leading to full network compromise.