CVE-2024-34698 Information

Description

FreeScout is a free self-hosted help desk and shared mailbox. Versions of FreeScout prior to 1.8.139 contain a Prototype Pollution vulnerability in the /public/js/main.js source file. The Prototype Pollution arises because the getQueryParam Function recursively merges an object containing user-controllable properties into an existing object (For URL Query Parameters Parsing) without first sanitizing the keys. This can allow an attacker to inject a property with a key __proto__ along with arbitrarily nested properties. The merge operation assigns the nested properties to the params object’s prototype instead of the target object itself. As a result the attacker can pollute the prototype with properties containing harmful values which are then inherited by user-defined objects and subsequently used by the application dangerously. The vulnerability lets an attacker control properties of objects that would otherwise be inaccessible. If the application subsequently handles an attacker-controlled property in an unsafe way this can potentially be chained with other vulnerabilities like DOM-based XSS Open Redirection Cookie Manipulation Link Manipulation HTML Injection etc. Version 1.8.139 contains a patch for the issue.

Reference

https://github.com/freescout-helpdesk/freescout/security/advisories/GHSA-rx6j-4c33-9h3r https://github.com/freescout-helpdesk/freescout/commit/2614514bc6d6c4ad563202a1c9cae5a97b195cc5