ThinkCMF Local File Inclusion Scanner

ThinkCMF is a content management framework often utilized for developing web applications. It provides developers with robust tools to create user-friendly and dynamic websites. The framework is widely adopted by small to medium-sized businesses seeking quick web solutions. Its flexibility and modular nature allow for seamless integration of third-party plugins and features. Furthermore, ThinkCMF prides itself on an active community that contributes to its improvement. Consequently, its wide usage across diverse platforms makes security a paramount concern.

Local File Inclusion (LFI) is a critical vulnerability that allows unauthorized users to include files on a server through the web browser. This can potentially enable attackers to access sensitive information, execute arbitrary code, or escalate their privileges. LFI exploits typically target improperly sanitized user inputs in file paths. The risk is significant because, once exploited, it can lead to the complete compromise of server systems. Such vulnerabilities require constant monitoring and timely updates to patches. In the context of ThinkCMF, it represents a substantial threat to data security.

Technical details of the ThinkCMF vulnerability reveal that it allows unauthorized file inclusion by manipulating user input. The vulnerable endpoint is triggered through improper path sanitization in URLs, such as those structured as {{BaseURL}}/?a=display&templateFile=README.md. Vulnerable parameters include templateFile where the LFI vulnerability can be exploited by appending path traversal sequences. Users can potentially access critical system files like /etc/passwd on Unix systems. This exposure underscores the importance of input validation and secure coding practices.

Exploitation of this vulnerability could lead to severe consequences, including unauthorized data access and code execution. Attackers might retrieve confidential information, making it vulnerable to data breaches and exploitation. System compromise could lead to unauthorized access to sensitive areas, causing shutdowns or service interruptions. Furthermore, it might enable lateral attacks across the network, multiplying the damage inflicted. In worst-case scenarios, complete server takeover and persistent backdoor access can occur.

REFERENCES

• https://www.freebuf.com/vuls/217586.html