HUAWEI HG659 Local File Inclusion Scanner

HUAWEI HG659 is utilized across various industries and organizations, primarily serving as a home and small business broadband router. It enables internet connectivity for a wide range of devices across a network, making it crucial for seamless operation of internet-dependent tasks. Telecom operators often employ this device for the distribution of broadband services to their customers. Its user-friendly interface allows easy setup and management, appealing to non-technical users. The device supports various broadband connection types, and its built-in features like Wi-Fi, firewall, and parental controls make it a popular choice. As a networking device, its performance and security directly impact user internet experience.

The Local File Inclusion (LFI) vulnerability allows an attacker to force the web application to include files present on the server. It can be exploited by manipulating input fields or parameters passed to the server without adequate validation or sanitization. This vulnerability is severe because it might allow attackers to access sensitive file contents or write unauthorized files to the server. If successfully exploited, it may also facilitate further attacks such as remote code execution. LFI vulnerabilities are commonly used by attackers to exploit applications that rely heavily on including files based on user input. It's a significant security issue that can compromise the integrity and confidentiality of data on the affected system.

The technical aspect of the LFI vulnerability in HUAWEI HG659 involves improper handling and validation of file paths in HTTP requests. Specifically, the vulnerability lies in the way input paths are processed by the device's web interface, allowing potential traversal of directories to access sensitive files like '/etc/passwd'. Attackers can manipulate the URL path to traverse directories beyond the intended scope, exploiting this loophole to gather sensitive system information. The endpoint under scrutiny does not adequately restrict input parameters, thereby facilitating exploitation. Web servers that do not validate user input for directory traversal attempts are particularly susceptible. By accessing critical files, attackers can map out further attack vectors on the target.

Exploiting this vulnerability can lead to significant security breaches. A successful attack might compromise sensitive system files containing credentials or system configurations. Attackers can use this information as a stepping stone to conduct further exploits, such as privilege escalation or network infiltration. This vulnerability could thus threaten the confidentiality, integrity, and availability of the affected network. If a threat actor gains unauthorized access to critical files, it can result in data breaches, service disruptions, or full system compromise. In environments handling sensitive or regulated data, such exposure could lead to non-compliance with data protection regulations, ensuing financial and reputational damage.

REFERENCES

• https://twitter.com/sec715/status/1406782172443287559