CVE-2021-43283 in WR1200
Summary
by MITRE • 11/30/2021
An issue was discovered on Victure WR1200 devices through 1.0.3. A command injection vulnerability was found within the web interface of the device, allowing an attacker with valid credentials to inject arbitrary shell commands to be executed by the device with root privileges. This occurs in the ping and traceroute features. An attacker would thus be able to use this vulnerability to open a reverse shell on the device with root privileges.
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Analysis
by VulDB Data Team • 12/04/2021
The CVE-2021-43283 vulnerability affects Victure WR1200 devices running firmware versions up to 1.0.3, representing a critical command injection flaw that undermines the device's web interface security posture. This vulnerability specifically targets the ping and traceroute functionalities within the device's management interface, creating a pathway for authenticated attackers to execute arbitrary shell commands with root-level privileges. The flaw demonstrates a fundamental failure in input validation and sanitization within the device's web application, allowing malicious command sequences to be processed and executed directly by the underlying operating system without proper security controls.
The technical implementation of this vulnerability stems from inadequate parameter validation within the web interface's handling of network diagnostic commands. When users attempt to perform ping or traceroute operations through the web interface, the device fails to properly sanitize user-supplied input before incorporating it into system commands. This lack of input sanitization creates a classic command injection vector where attacker-controlled data can be interpreted as executable shell commands rather than simple parameters. The vulnerability operates at the application layer and leverages the device's legitimate administrative functions to achieve unauthorized code execution, making it particularly dangerous as it bypasses normal authentication checks and operates within the device's trusted execution environment.
From an operational perspective, this vulnerability presents a severe risk to network security infrastructure as it allows authenticated attackers to gain root access to the device's operating system. The ability to execute commands with root privileges enables attackers to manipulate the device's core functionality, potentially leading to complete system compromise and unauthorized access to network resources. The vulnerability specifically enables the establishment of reverse shells, which allows attackers to maintain persistent access and execute further malicious activities against the network. This capability transforms a simple network diagnostic tool into a weapon for lateral movement and privilege escalation within the network environment.
The impact of this vulnerability extends beyond immediate device compromise as it represents a critical weakness in the device's security architecture that could be exploited to gain unauthorized access to sensitive network infrastructure. Organizations relying on Victure WR1200 devices for network management or security functions face significant exposure risks, as the compromised device could serve as a foothold for broader network infiltration. The vulnerability's presence in the web interface also means that attackers could potentially exploit it through various attack vectors including credential theft, session hijacking, or social engineering campaigns targeting device administrators. This makes the vulnerability particularly concerning for environments where these devices are deployed as part of critical network infrastructure or security monitoring systems.
Mitigation strategies for CVE-2021-43283 should focus on immediate firmware updates from the vendor, which would address the underlying input validation flaws and provide proper sanitization of user-supplied parameters. Network segmentation and access control measures should be implemented to limit administrative access to these devices, ensuring that only authorized personnel can perform administrative functions. Regular monitoring of network traffic for suspicious command execution patterns and implementing network-based intrusion detection systems can help identify exploitation attempts. Additionally, organizations should conduct comprehensive vulnerability assessments of their network infrastructure to identify other devices that may be vulnerable to similar command injection flaws, particularly those implementing web-based management interfaces. The vulnerability aligns with CWE-77 and CWE-89 categories related to command injection and improper input sanitization, and represents a technique commonly associated with attack patterns in the MITRE ATT&CK framework under the execution and privilege escalation domains.