CVE-2024-28121— StimulusReflex 安全漏洞

Reflex arbitrary method call in stimulus_reflex

stimulus_reflex is a system to extend the capabilities of both Rails and Stimulus by intercepting user interactions and passing them to Rails over real-time websockets. In affected versions more methods than expected can be called on reflex instances. Being able to call some of them has security implications. To invoke a reflex a websocket message of the following shape is sent: `\"target\":\"[class_name]#[method_name]\",\"args\":[]`. The server will proceed to instantiate `reflex` using the provided `class_name` as long as it extends `StimulusReflex::Reflex`. It then attempts to call `method_name` on the instance with the provided arguments. This is problematic as `reflex.method method_name` can be more methods that those explicitly specified by the developer in their reflex class. A good example is the instance_variable_set method. This vulnerability has been patched in versions 3.4.2 and 3.5.0.rc4. Users unable to upgrade should: see the backing GHSA advisory for mitigation advice.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

使用外部可控制的输入来选择类或代码(不安全的反射)

StimulusReflex 安全漏洞

StimulusReflex是一个通过拦截用户交互并通过实时 Websocket 将其传递给 Rails 来扩展 Rails 和 Stimulus 功能的系统。 StimulusReflex 3.4.1及之前版本，3.5.0.rc3及之前版本存在安全漏洞，该漏洞源于允许在reflex实例上调用任意方法，包括一些不安全方法。

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