Longjing Technology BEMS API Local File Inclusion Scanner

The Longjing Technology BEMS API is widely used in building energy management systems by utility companies and large organizations to monitor and manage energy consumption data. It serves as an interface that allows integration with other software systems and supports functionalities like data collection and visualization. Organizations deploy it to optimize energy usage, improve efficiency, and reduce operational costs. Given its critical role in energy management, maintaining the security of this API is imperative for preventing unauthorized access and data breaches. The API facilitates seamless data exchanges between different platforms, making it indispensable in smart building solutions. Its widespread adoption in the energy sector highlights its importance in enabling real-time energy management and decision-making.

Local File Inclusion (LFI) is a vulnerability that allows an attacker to include files on a server through the web browser. This can lead to sensitive information disclosure, such as password files or system configuration files, if not properly mitigated. The vulnerability resides in the improper validation of user-supplied input, enabling attackers to manipulate file paths. Exploiting LFI can provide unauthorized access to files stored on the server, posing a significant security risk. Attackers may utilize this vulnerability to read files intended to be restricted, potentially exposing sensitive data. Due to its potential impacts, addressing LFI vulnerabilities is crucial to maintaining a secure application environment.

The technical details of this vulnerability involve the improper handling of file paths through the 'fileName' parameter in the downloads API endpoint. By sending a specially crafted request, an attacker can perform directory traversal, allowing them to read arbitrary files from the server. The vulnerable endpoint does not adequately sanitize the input, facilitating the inclusion of files located outside the intended directory. Attackers typically use sequence patterns like "../../../../" to navigate the directory hierarchy and access files. The failure in verifying the legitimacy of the requested file path enables this attack. This vulnerability highlights the necessity for rigorous input validation to protect against unauthorized file access.

If exploited, a Local File Inclusion vulnerability can have severe consequences, including exposure of sensitive information and unauthorized access to system files. Malicious actors may gain insights into the server's configuration, security settings, and user credentials. This could lead to a wider compromise if the attacker uses the disclosed information to carry out further attacks, such as privilege escalation or remote code execution. Additionally, accessing configuration files might allow attackers to manipulate system settings, potentially impairing service integrity. Protecting against LFI is essential to safeguard sensitive data and maintain the confidentiality, integrity, and availability of the software and system.

REFERENCES

• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5657.php
• https://packetstormsecurity.com/files/163702/