CVE-2023-37568 in WRC-1167GHBK-S
Summary
by MITRE • 07/13/2023
ELECOM wireless LAN routers WRC-1167GHBK-S v1.03 and earlier, and WRC-1167GEBK-S v1.03 and earlier allow a network-adjacent authenticated attacker to execute an arbitrary command by sending a specially crafted request to the web management page.
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Analysis
by VulDB Data Team • 08/02/2023
The vulnerability identified as CVE-2023-37568 affects ELECOM wireless LAN routers including models WRC-1167GHBK-S and WRC-1167GEBK-S running firmware versions v1.03 and earlier. This represents a critical security flaw that allows authenticated attackers with network access to execute arbitrary commands on the affected devices. The vulnerability exists within the web management interface of these routers, making it particularly dangerous as it can be exploited by attackers who have gained access to the local network and have valid credentials for the router administration interface.
The technical nature of this vulnerability stems from improper input validation and sanitization within the web management page functionality. When an authenticated user sends a specially crafted HTTP request to the router's web interface, the system fails to properly validate or sanitize the input parameters before processing them. This leads to a command injection vulnerability that allows an attacker to inject malicious commands that are then executed with the privileges of the web server process. The flaw is classified as a command injection vulnerability under CWE-77, which specifically addresses situations where user-supplied data is incorporated into system commands without proper validation or escaping mechanisms.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this vulnerability can gain full control over the affected router, potentially leading to complete network compromise. The attacker could modify router configurations, redirect traffic, establish backdoors, or use the router as a pivot point to attack other devices within the local network. This vulnerability directly aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1021.001 for Remote Services, as it enables the execution of arbitrary commands and provides remote access capabilities through the router's web interface.
Network-adjacent attackers who have authenticated access to the router's management interface can leverage this vulnerability to escalate their privileges and gain unauthorized control over the device. The attack vector requires only network proximity and valid authentication credentials, making it particularly dangerous in environments where physical security is lacking or where credentials may be compromised through social engineering or other means. The affected devices represent a significant risk to enterprise and home network security, as routers serve as critical network infrastructure components that, when compromised, can provide attackers with extensive network access and control capabilities.
Mitigation strategies for this vulnerability include immediate firmware updates from ELECOM to address the command injection flaw, implementing network segmentation to limit access to router management interfaces, and enforcing strict access controls including strong authentication mechanisms. Organizations should also consider implementing network monitoring to detect suspicious command execution patterns and establish regular security assessments to identify similar vulnerabilities in other network infrastructure components. The vulnerability highlights the importance of proper input validation and output encoding in web applications, as well as the need for regular firmware updates and security patches to protect against known vulnerabilities.