CVE-2018-21139 in D1500
Summary
by MITRE
Certain NETGEAR devices are affected by disclosure of sensitive information. This affects D1500 before 1.0.0.27, D500 before 1.0.0.27, D6100 before 1.0.0.58, D6200 before 1.1.00.30, D6220 before 1.0.0.46, D6400 before 1.0.0.82, D7000 before 1.0.1.68, D7000v2 before 1.0.0.51, D7800 before 1.0.1.42, D8500 before 1.0.3.42, DC112A before 1.0.0.40, DGN2200Bv4 before 1.0.0.102, DGN2200v4 before 1.0.0.102, JNR1010v2 before 1.1.0.54, JR6150 before 1.0.1.18, JWNR2010v5 before 1.1.0.54, PR2000 before 1.0.0.24, R6020 before 1.0.0.34, R6050 before 1.0.1.18, R6080 before 1.0.0.34, R6100 before 1.0.1.22, R6120 before 1.0.0.42, R6220 before 1.1.0.68, R6250 before 1.0.4.30, R6300v2 before 1.0.4.32, R6400 before 1.0.1.44, R6400v2 before 1.0.2.60, R6700 before 1.0.1.48, R6700v2 before 1.2.0.24, R6800 before 1.2.0.24, R6900 before 1.0.1.48, R6900P before 1.3.1.44, R6900v2 before 1.2.0.24, R7000 before 1.0.9.34, R7000P before 1.3.1.44, R7100LG before 1.0.0.48, R7300 before 1.0.0.68, R7500 before 1.0.0.124, R7500v2 before 1.0.3.38, R7900 before 1.0.2.16, R7900P before 1.4.1.24, R8000 before 1.0.4.18, R8000P before 1.4.1.24, R8300 before 1.0.2.122, R8500 before 1.0.2.122, WN3000RP before 1.0.0.68, WN3000RPv2 before 1.0.0.68, WNDR3400v3 before 1.0.1.18, WNDR3700v4 before 1.0.2.102, WNDR3700v5 before 1.1.0.54, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.56, WNDR4500v3 before 1.0.0.56, WNR1000v4 before 1.1.0.54, WNR2020 before 1.1.0.54, WNR2050 before 1.1.0.54, and WNR3500Lv2 before 1.2.0.54.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 06/02/2024
This vulnerability represents a sensitive information disclosure issue affecting numerous NETGEAR router models across multiple product lines including the D-series, R-series, and various wireless gateway devices. The flaw manifests in the authentication and session management mechanisms of these devices, allowing unauthenticated attackers to access confidential information through specific API endpoints or configuration interfaces. The vulnerability impacts devices running firmware versions prior to the specified patches, with each model having its own version threshold for vulnerability status. This issue falls under the CWE-200 category of Information Exposure, where sensitive data is accessible without proper authorization. The disclosure affects the fundamental security posture of these network devices, potentially exposing administrative credentials, network configuration details, or other sensitive operational data.
The technical implementation of this vulnerability stems from inadequate input validation and insufficient access controls within the web interface or API handlers of affected NETGEAR routers. Attackers can exploit this weakness by sending crafted requests to specific endpoints that should require authentication or proper authorization. The vulnerability typically occurs when the device fails to properly verify the identity of users attempting to access sensitive configuration parameters or administrative functions. This misconfiguration allows attackers to bypass authentication mechanisms or access data that should only be available to authorized administrative users. The flaw demonstrates poor application security practices and inadequate security controls in the device's web server implementation, where session management and access control checks are either missing or improperly enforced.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates potential entry points for more sophisticated attacks within network environments. An attacker who successfully exploits this vulnerability can gain insights into the network topology, device configurations, and potentially extract administrative credentials that could enable complete device compromise. This information disclosure could facilitate further attacks including man-in-the-middle operations, credential reuse attacks, or privilege escalation attempts within the local network. The widespread nature of affected devices across multiple product lines and firmware versions indicates a systemic issue in NETGEAR's security implementation that affects thousands of network endpoints. Organizations relying on these devices may experience compromised network security, unauthorized access to sensitive information, and potential data exfiltration from their internal networks.
Mitigation strategies for this vulnerability require immediate firmware updates from NETGEAR to address the information disclosure issue in affected devices. Network administrators should prioritize patching all vulnerable router models to the latest firmware versions that contain security fixes for this issue. Additionally, network segmentation and access controls should be implemented to limit exposure of these devices to untrusted networks, while monitoring for suspicious access patterns or unauthorized configuration changes. Security teams should conduct comprehensive network assessments to identify all affected devices and implement network-based controls to prevent unauthorized access to administrative interfaces. The vulnerability highlights the importance of regular security updates and proper access control implementation in network infrastructure devices, aligning with security best practices outlined in the MITRE ATT&CK framework under the information gathering and credential access phases. Organizations should also implement network monitoring solutions to detect unauthorized access attempts and maintain detailed logs of administrative activities for forensic analysis purposes.