Vulnerability · Published Mar 12, 2024 · Assigned by GitHub_M
CVE-2024-28121Reflex arbitrary method call in stimulus_reflex
High 8.8
In plain English
A high-severity security flaw in stimulus_reflex from stimulusreflex. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| RubyGems | stimulus_reflex | 3.5.0.rc4 | GHSA-f78j-4w3g-4q65 |
| RubyGems | stimulus_reflex | 3.4.2 | GHSA-f78j-4w3g-4q65 |
| npm | stimulus_reflex | 3.5.0-rc4 | GHSA-f78j-4w3g-4q65 |
| npm | stimulus_reflex | 3.4.2 | GHSA-f78j-4w3g-4q65 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| stimulusreflex | stimulus_reflex | >= 3.5.0.rc1, < 3.5.0.rc4< 3.4.2 |
Weakness: CWE-470 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-4w3g-4q65 x_refsource_CONFIRM
- https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c72335ea92096cd0c7f x_refsource_MISC
- https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159d657e44cee51b9b/app/channels/stimulus_reflex/channel.rb#L83 x_refsource_MISC
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2 x_refsource_MISC
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4 x_refsource_MISC
- http://seclists.org/fulldisclosure/2024/Mar/16