![]() A secure application generates and signs temporary policies for users. Each application uses an automatically generated secret code to sign. Filestack uses Base64URL-encoded Javascript Object Notation (JSON) “policies” to authorize specific actions and HMAC-SHA256 “signatures” to authenticate them. ![]() Users can also configure individual security settings for an application through the Developer Portal. Taking these precautions will help prevent infected files from spreading, protecting data on both the application and user ends. Virus detection within Filestack Workflows will quarantine malicious programs until they’re able to be reviewed. With Filestack’s virus detection API, you can ensure that user files are screened and deemed secure for transfer and storage. As such, it is vital to provide a single secured gateway for file upload to your application. Unsecured file upload and transfer often allows malicious code to propagate. If you believe the risk is minimal, you can allow general access and notify users of a potential security threat. You may choose to grant access to specific administrators and temporarily deny access to general users until the files are sanitized. ![]() Any user who accesses malicious code risks having the virus spread throughout their system. Access ControlĪfter you identify the infected file(s), it is vital to determine who can open, modify, and transfer those files. The gateway you use to facilitate file transfers should also be able to handle large amounts of data. Filestack allows users to securely upload and store a variety of files across desktop and mobile devices without sacrificing speed or ease of use. When working with SVG, HTML, and other file types, it is vital to protect the files’ data no matter which direction it travels. Secure Transfer and Storageįilestack’s API automatically encrypts files during transfer and storage, minimizing the risk of data theft. Filestack’s file picker allows users to strip the exif data on the client side, allowing for a secure upload, every time. Setting the strip parameter to true removes embedded metadata at the source, purging malicious code hidden within. Users with additional security needs can use another boolean parameter called strip. Sanitizing SVG and HTML files helps prevent cross-site scripting (XSS) attacks. Filestack users can implement a variety of parameters to remove insecure tags. The secure parameter is a boolean parameter that when set to true, will detect and strip these insecure tags from the SVG or HTML file. This process, called HTML sanitization, will not affect most basic formatting tags, but will remove complex tags that run scripts, call objects, embed files, or link to potentially dangerous sites. Malicious code is often stored in the form of tags. If a user uploads or delivers an infected SVG or HTML file, the virus has the potential to execute and spread to recipient files. If the user agrees to the installation, their login credentials, credit card information, and other sensitive data may fall into the wrong hands. These sites often prompt users to install spyware disguised as a browser plugin or, ironically, a virus detection program. For example, an infected SVG file can redirect users to a malicious website disguised as a reputable one. SVG files can also contain embedded JavaScript (JS) code, a potential vulnerability. ![]() At their core, SVG files are no different than standard plain text documents that provide instructions on how to display text, colors, shapes, and other graphical elements. SVG files are vector graphics based on XML. ![]()
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