CVE-2021-43831 Scanner

Gradio is widely used for building user interfaces in machine learning applications. It is utilized by developers and data scientists to create interactive applications that allow users to input data and receive model outputs. The Gradio framework simplifies the deployment of AI models into applications, making it accessible across various industries, including finance, healthcare, and entertainment. Due to its integration capabilities, it is often used in collaborative projects that require a web-based interface for model interactions. Generally, Gradio ensures that building machine learning interfaces remains straightforward and efficient. However, vulnerabilities in such platforms can compromise data security and user privacy.

The Arbitrary File Read vulnerability within Gradio allows for unauthorized access to files stored on the host server. This vulnerability arises from improper handling of path traversal requests, enabling attackers to read sensitive files. Typically, this flaw is exploited by navigating the server’s directory structure using relative paths. Since this vulnerability impacts a broad array of web applications utilizing Gradio, it poses a significant risk. The access to files is executed without authentication, making it critical to address this issue immediately. This flaw underlines the importance of validating and sanitizing user inputs to prevent directory traversal attacks.

The vulnerability's technical root lies in the inadequate validation of file path inputs in Gradio. Attackers can manipulate URL paths by injecting dot-dot-slash sequences to traverse directories inappropriately. This enables them to access files outside the application's root directory. The specific endpoint vulnerable to this attack is typically one that accepts file path parameters without sufficient checks. Patterns such as "../../../../" can be used to navigate through the filesystem to expose potentially sensitive information. This vulnerability must be patched to prevent exploitation as it can expose key system files like '/etc/passwd' on Linux systems or 'win.ini' on Windows systems.

Exploiting this Arbitrary File Read vulnerability can lead to several adverse effects. Sensitive information such as user credentials, configuration files, and internal server data may be disclosed. Such data exposure can lead to further attacks, including privilege escalation, information leakage, and unauthorized access. The vulnerability, if left unaddressed, could compromise the server's integrity and the confidentiality of the data stored. Furthermore, this exposure poses compliance issues with data protection regulations. Therefore, addressing this vulnerability is crucial to safeguarding systems against potential data breaches.

REFERENCES

• https://github.com/gradio-app/gradio/security/advisories/GHSA-rhq2-3vr9-6mcr
• https://github.com/gradio-app/gradio/commit/41bd3645bdb616e1248b2167ca83636a2653f781