yishaadmin Local File Inclusion Scanner

yishaadmin is a management platform often used by software developers, IT administrators, and businesses to manage system files and configurations easily. The software provides users with capabilities to oversee and modify server files, facilitating efficient administrative tasks. Its intuitive interface enables quick access to numerous functionalities, aiding in seamless file interactions and operational oversight. The application is regularly employed in environments requiring stringent file management and system administration capabilities. It's favored in contexts where streamlined operations and precise control over system elements are paramount. Users rely on yishaadmin for its reliability in executing high-level administrative tasks, ensuring both functionality and efficiency.

The Local File Inclusion (LFI) vulnerability allows attackers to gain unauthorized access to application files. When exploited, the vulnerability can reveal sensitive information, posing a significant risk to system security. It is characterized by the unintended inclusion of files within an application, often leading to further security breaches if left unmanaged. Attackers may manipulate input to access unintended files or directories, accessing confidential data. This vulnerability typically arises from inadequate validation of user-supplied input, making unauthorized file access possible. Identifying and rectifying such vulnerabilities is crucial for maintaining system integrity and protecting sensitive information.

The Local File Inclusion vulnerability in yishaadmin occurs via the "/admin/File/DownloadFile" endpoint. The vulnerability permits files to be downloaded, read, or even deleted without requiring authentication. It arises from improper handling and validation of user inputs in file path parameters. An attacker can employ directory traversal sequences to navigate the file system, potentially accessing restricted or sensitive files. The vulnerability's exploit can be observed by attempting to access paths like "/etc/passwd," verifying the application exhibits unauthorized file access. Properly securing endpoints and refining input validation procedures are vital for mitigating this risk effectively.

Exploiting the Local File Inclusion vulnerability can lead to unauthorized file access, compromising sensitive data and potentially destabilizing the operational environment. Malicious actors exploiting this vulnerability could retrieve confidential files, leading to further attacks based on the information obtained. Unauthorized file deletion or modification can also occur, significantly affecting application performance and integrity. Critical system files may be exposed or altered, creating opportunities for privilege escalation or system manipulation. The ongoing exposure to such vulnerabilities can result in trust erosion with clients and stakeholders, emphasizing the importance of swift vulnerability management.

REFERENCES

• https://huntr.dev/bounties/2acdd87a-12bd-4ce4-994b-0081eb908128/
• https://github.com/liukuo362573/YiShaAdmin/blob/master/YiSha.Util/YiSha.Util/FileHelper.cs#L181-L186