CVE-2022-25915 in WRC-1167GST2
Summary
by MITRE • 03/31/2022
Improper access control vulnerability in ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attacker to bypass access restriction and to access the management screen of the product via unspecified vectors.
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Analysis
by VulDB Data Team • 04/02/2022
This vulnerability represents a critical improper access control flaw affecting multiple ELECOM LAN router models including WRC-1167GST2, WRC-2533GS2, WRC-1750GS, and WRC-1900GST series. The issue manifests in firmware versions up to and including v1.25 for certain models and v1.03 for others, creating a widespread security concern across the product line. The vulnerability specifically allows network-adjacent authenticated attackers to bypass access restrictions and gain unauthorized access to the management interface of these devices, potentially compromising the entire network infrastructure.
The technical implementation of this access control bypass occurs through unspecified vectors within the router's authentication and authorization mechanisms. While the exact technical details remain undisclosed, such vulnerabilities typically stem from inadequate input validation, flawed session management, or improper privilege checks within the web-based management interface. Attackers who can establish a network connection to the affected routers and authenticate with valid credentials can exploit this weakness to escalate their privileges and access administrative functions that should otherwise be restricted to authorized personnel only. This flaw directly violates the principle of least privilege and can be classified under CWE-284 Access Control Bypass, which is categorized under the broader category of access control vulnerabilities in the CWE taxonomy.
The operational impact of this vulnerability extends far beyond simple unauthorized access. Once exploited, attackers can manipulate router configurations, modify network settings, redirect traffic, disable security features, and potentially establish persistent backdoors within the network infrastructure. This creates a significant risk for organizations relying on these devices for network security, as the compromised routers become potential entry points for lateral movement and advanced persistent threats. The vulnerability's presence in multiple firmware versions across different router models suggests a systemic flaw in the development and testing processes, potentially affecting hundreds or thousands of devices deployed in enterprise and small business environments. This type of vulnerability is particularly concerning from an ATT&CK framework perspective as it maps to techniques such as privilege escalation and persistence, and can enable subsequent attacks including credential access and defense evasion.
Mitigation strategies should prioritize immediate firmware updates from ELECOM to address the identified access control flaws, though organizations should also implement network segmentation to isolate affected devices from critical infrastructure. Network monitoring should be enhanced to detect unusual administrative access patterns, and access controls should be reviewed to ensure proper authentication mechanisms are in place. Organizations should also consider implementing network access control lists and disabling unnecessary administrative services to reduce the attack surface. The vulnerability demonstrates the importance of robust access control implementation and the necessity of comprehensive security testing during firmware development cycles, particularly for network infrastructure devices that form the foundation of enterprise security posture.