Parse Server up to 5.4.3/6.1.0 API unrestricted upload

Summaryinfo

A vulnerability labeled as problematic has been found in Parse Server up to 5.4.3/6.1.0. This affects an unknown part of the component API. Executing a manipulation can lead to unrestricted upload. The identification of this vulnerability is CVE-2023-32689. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Parse Server up to 5.4.3/6.1.0. It has been declared as problematic. This vulnerability affects an unknown part of the component API. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality. CVE summarizes:

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Versions prior to 5.4.4 and 6.1.1 are vulnerable to a phishing attack vulnerability that involves a user uploading malicious files. A malicious user could upload an HTML file to Parse Server via its public API. That HTML file would then be accessible at the internet domain at which Parse Server is hosted. The URL of the the uploaded HTML could be shared for phishing attacks. The HTML page may seem legitimate because it is served under the internet domain where Parse Server is hosted, which may be the same as a company's official website domain. An additional security issue arises when the Parse JavaScript SDK is used. The SDK stores sessions in the internet browser's local storage, which usually restricts data access depending on the internet domain. A malicious HTML file could contain a script that retrieves the user's session token from local storage and then share it with the attacker. The fix included in versions 5.4.4 and 6.1.1 adds a new Parse Server option `fileUpload.fileExtensions` to restrict file upload on Parse Server by file extension. It is recommended to restrict file upload for HTML file extensions, which this fix disables by default. If an app requires upload of files with HTML file extensions, the option can be set to `['.*']` or another custom value to override the default.

The weakness was shared 05/30/2023 as GHSA-9prm-jqwx-45x9. The advisory is available at github.com. This vulnerability was named CVE-2023-32689 since 05/11/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1608.002 by the MITRE ATT&CK project.

Upgrading to version 5.4.4 or 6.1.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• Parse Server

Version

• 5.4.0
• 5.4.1
• 5.4.2
• 5.4.3
• 6.0
• 6.1.0

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