CVE-2022-28581 in A7100RU
Summary
by MITRE • 05/05/2022
It is found that there is a command injection vulnerability in the setWiFiAdvancedCfg interface in TOTOlink A7100RU (v7.4cu.2313_b20191024) router, which allows an attacker to execute arbitrary commands through a carefully constructed payload.
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Analysis
by VulDB Data Team • 05/08/2022
The command injection vulnerability identified in CVE-2022-28581 affects the TOTOlink A7100RU router model running firmware version v7.4cu.2313_b20191024 and specifically targets the setWiFiAdvancedCfg interface. This vulnerability represents a critical security flaw that enables remote attackers to execute arbitrary commands on the affected device, fundamentally compromising the router's integrity and security posture. The vulnerability exists within the web interface's input validation mechanisms, where user-supplied parameters are not properly sanitized before being processed by the underlying system commands.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization within the setWiFiAdvancedCfg endpoint. When an attacker submits maliciously crafted parameters to this interface, the system fails to properly escape or validate special characters that could be interpreted as command delimiters or operators. This allows attackers to inject additional commands that are subsequently executed with the privileges of the web server process, typically running with elevated permissions on the router. The vulnerability manifests as a classic command injection flaw that aligns with CWE-77, which specifically addresses improper neutralization of special elements used in command execution. Attackers can leverage this weakness to gain unauthorized access to the router's command shell, potentially leading to complete system compromise.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with persistent access to the network infrastructure. Once exploited, an attacker could modify network configurations, redirect traffic, establish backdoors, or use the compromised router as a pivot point for attacking other devices on the local network. The vulnerability affects both the wireless and wired network components of the router, potentially disrupting network services and creating persistent security risks for all connected devices. This type of vulnerability directly aligns with ATT&CK technique T1059.001, which covers command and scripting interpreter, and represents a significant threat to network security and integrity.
Mitigation strategies for this vulnerability should include immediate firmware updates from TOTOlink, which would contain patches addressing the input validation flaws in the web interface. Network administrators should also implement network segmentation and access control measures to limit the potential impact of exploitation. Additional protective measures include disabling unnecessary web interfaces, implementing web application firewalls, and conducting regular security assessments of network devices. The vulnerability demonstrates the importance of proper input validation and output encoding in web applications, particularly in network infrastructure devices where command execution capabilities pose severe risks to overall network security and compliance with industry standards such as NIST SP 800-160 and ISO/IEC 27001. Organizations should also consider implementing continuous monitoring and vulnerability scanning to detect similar flaws in other network components and ensure comprehensive security coverage across their infrastructure.