Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Stimulusreflex | Stimulusrelfex | < 3.4.2 |
Related Weaknesses (CWE)
References
- http://seclists.org/fulldisclosure/2024/Mar/16ExploitThird Party Advisory
- https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159Technical Description
- https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c7Patch
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2ProductRelease Notes
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4ProductRelease Notes
- https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-ExploitVendor Advisory
- http://seclists.org/fulldisclosure/2024/Mar/16ExploitThird Party Advisory
- https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159Technical Description
- https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c7Patch
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2ProductRelease Notes
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4ProductRelease Notes
- https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-ExploitVendor Advisory
FAQ
What is CVE-2024-28121?
CVE-2024-28121 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 metho...
How severe is CVE-2024-28121?
CVE-2024-28121 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-28121?
Check the references section above for vendor advisories and patch information. Affected products include: Stimulusreflex Stimulusrelfex.