CVE-2023-49593 in WBR-6013
Summary
by MITRE • 07/08/2024
Leftover debug code exists in the boa formSysCmd functionality of LevelOne WBR-6013 RER4_A_v3411b_2T2R_LEV_09_170623. A specially crafted network request can lead to arbitrary command execution.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/12/2024
The vulnerability identified as CVE-2023-49593 represents a critical security flaw within the LevelOne WBR-6013 wireless router firmware version RER4_A_v3411b_2T2R_LEV_09_170623. This issue stems from the presence of leftover debug code within the boa formSysCmd functionality, which is a web server component commonly used in embedded networking devices. The persistence of debug code in production firmware represents a fundamental security oversight that directly violates secure coding practices and exposes devices to significant operational risks. The vulnerability specifically affects the router's web-based management interface, where the debug functionality remains accessible despite being intended for development purposes only.
The technical flaw manifests through the improper handling of network requests within the boa web server implementation. When a malicious actor crafts a specially formatted network request, the debug code within formSysCmd executes with elevated privileges, potentially allowing arbitrary command execution on the affected device. This vulnerability operates at the application layer and leverages the web server's command processing capabilities to bypass normal authentication mechanisms. The attack vector requires network access to the device's management interface and does not require physical access or advanced exploitation techniques. The presence of debug code suggests poor software development lifecycle practices where testing artifacts were not properly removed before firmware release, creating a persistent security risk that affects all devices running the vulnerable firmware version.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with complete control over the affected router. This includes the ability to modify network configurations, redirect traffic, establish backdoors, and potentially use the device as a pivot point for attacking other systems within the local network. The vulnerability affects the device's core functionality, potentially compromising network security and enabling man-in-the-middle attacks. Organizations relying on LevelOne WBR-6013 routers for network infrastructure may face unauthorized access to their network traffic, loss of network control, and potential data exfiltration. The vulnerability's persistence across multiple devices indicates a systemic issue in the firmware development and quality assurance processes, affecting numerous network endpoints simultaneously.
Mitigation strategies for CVE-2023-49593 should prioritize immediate firmware updates from LevelOne, as this represents the most effective remediation approach. Network administrators should implement network segmentation and access controls to limit exposure of affected devices, while monitoring network traffic for suspicious activities that may indicate exploitation attempts. The vulnerability aligns with CWE-489, which addresses the presence of debug code in production systems, and demonstrates characteristics consistent with ATT&CK technique T1059.007 for command and scripting interpreter. Organizations should also consider implementing network-based intrusion detection systems to monitor for crafted requests targeting the specific vulnerable interface, and conduct comprehensive network assessments to identify all potentially affected devices. The incident highlights the importance of proper code review processes and the need for thorough security testing before releasing embedded firmware to production environments.