Lionfish CMS Arbitrary File Upload Scanner

Lionfish CMS is a content management system designed to facilitate the creation, management, and modification of digital content by multiple users in a collaborative setting. It is typically used by businesses, developers, and content creators to manage web applications efficiently. The system supports a wide range of content types and allows for extendable functionalities via plugins and add-ons. The primary objective of Lionfish CMS is to improve the user experience by providing streamlined content management capabilities. Due to its versatility, it is implemented in various industries, offering flexible deployment options. As a widely used platform, it is essential to ensure its security parameters are tested regularly to protect against potential vulnerabilities.

Arbitrary File Upload vulnerabilities occur when a web application allows files to be uploaded to the server without adequate security checks. Such vulnerabilities enable attackers to upload malicious files, potentially leading to server-side exploits or data breaches. The vulnerability can be exploited by adversaries to impersonate legitimate users or execute unauthorized code on the server. In the case of Lionfish CMS, this vulnerability may allow attackers to upload and execute arbitrary PHP scripts, compromising the integrity and security of the entire application. Preventing this vulnerability requires comprehensive checks and validation on all file uploads. These security measures are crucial for maintaining the trust and security of the users' data and the web application itself.

The technical details of the vulnerability in Lionfish CMS involve the improper handling and validation of files uploaded via 'wxapp.php' at the endpoint 'controller=Goods.doPageUpload'. This endpoint fails to verify the file type and content, allowing malicious files to be uploaded through form-data requests. The parameter 'upfile' is susceptible to exploitation, as demonstrated by the example usage of a file named 'test.php'. The server responds with a HTTP 200 status code and includes specific words in the response body, confirming successful upload. Such flaws in the code and logic checks at this endpoint make it a prime target for exploitation, necessitating immediate security patches and code reviews to rectify these weaknesses.

When exploited, this vulnerability can have significant repercussions, such as unauthorized access to the server and sensitive data. It may also result in the execution of arbitrary code, which could be harnessed to deploy malware across the network. This could lead to a full compromise of the system, resulting in data theft, service disruption, and loss of user trust. Web applications with such vulnerabilities are prone to becoming launchpads for further attacks, potentially affecting not just the application, but connected systems as well. Therefore, it is crucial for administrators to mitigate these risks by implementing stringent file handling policies and ensuring robust security mechanisms are in place.

REFERENCES

• https://github.com/govbk/WIKI-POC-EXP/blob/7d1194429dab9f9dd8139408e79b70ddb41a468f/PeiQi_Wiki/CMS%E6%BC%8F%E6%B4%9E/%E7%8B%AE%E5%AD%90%E9%B1%BCCMS/%E7%8B%AE%E5%AD%90%E9%B1%BCCMS%20wxapp.php%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0%E6%BC%8F%E6%B4%9E.md