CVE-2023-37567 in WRC-1167GHBK3-A
Summary
by MITRE • 07/13/2023
ELECOM wireless LAN router WRC-1167GHBK3-A v1.24 and earlier allows a remote unauthenticated attacker to execute an arbitrary command by sending a specially crafted request to a certain port of the web management page.
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Analysis
by VulDB Data Team • 08/02/2023
The vulnerability identified as CVE-2023-37567 affects the ELECOM wireless LAN router model WRC-1167GHBK3-A version 1.24 and earlier, representing a critical remote command execution flaw that exposes network infrastructure to unauthorized manipulation. This vulnerability resides within the web management interface of the router, specifically targeting a particular port that handles administrative requests. The flaw enables an unauthenticated attacker to inject and execute arbitrary commands on the affected device without requiring any prior authentication credentials, fundamentally compromising the device's security posture and potentially the entire network it protects.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the router's web management interface. When a specially crafted HTTP request is sent to the targeted port, the device fails to properly validate or sanitize the incoming data, allowing malicious payloads to be interpreted and executed as system commands. This represents a classic command injection vulnerability where user-controllable input directly influences the execution flow of the underlying operating system. The vulnerability aligns with CWE-77 and CWE-94 categories, which specifically address command injection and code injection flaws that permit arbitrary code execution. The attack vector operates entirely over the network without requiring physical access or legitimate credentials, making it particularly dangerous for enterprise and residential networks alike.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially allowing attackers to completely compromise the router's functionality and use it as a foothold for broader network infiltration. An attacker could leverage this vulnerability to modify router configurations, redirect network traffic, establish persistent backdoors, or even use the device as a pivot point to attack other systems within the local network. The implications are particularly severe because wireless routers often serve as the primary gateway between internal networks and external internet connectivity, making them prime targets for attackers seeking to establish persistent access. This vulnerability also maps to several ATT&CK techniques including T1059.001 for command and scripting interpreter and T1021.001 for remote services, demonstrating how the flaw can be exploited to achieve broader operational goals within a network environment.
Mitigation strategies for CVE-2023-37567 should prioritize immediate firmware updates from ELECOM to address the underlying command injection vulnerability. Organizations must also implement network segmentation and access controls to limit exposure of administrative interfaces to trusted networks only. Additional protective measures include disabling unnecessary web management services, implementing firewall rules to restrict access to administrative ports, and conducting regular vulnerability assessments of network infrastructure. Network monitoring should be enhanced to detect unusual traffic patterns or command execution attempts on the affected ports. Security teams should also consider implementing intrusion detection systems that can identify and alert on known exploit patterns targeting this specific vulnerability. The remediation process must include thorough validation that the firmware update has been successfully applied and that no unauthorized modifications have been made to the device configuration during the exploitation window.