CVE-2024-28121
This vulnerability has been patched in versions 3.4.2 and 3.5.0.rc4.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.55% probability · 74th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-470
- Affected
- stimulusreflex/stimulusrelfex
- Source
- security-advisories@github.com
References
- http://seclists.org/fulldisclosure/2024/Mar/16Exploit, Third Party Advisory
- https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159d657e44cee51b9b/app/channels/stimulus_reflex/channel.rb#L83Technical Description
- https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c72335ea92096cd0c7fPatch
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2Product, Release Notes
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4Product, Release Notes
- https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-4w3g-4q65Exploit, Vendor Advisory
- http://seclists.org/fulldisclosure/2024/Mar/16Exploit, Third Party Advisory
- https://github.com/stimulusreflex/stimulus_reflex/blob/0211cad7d60fe96838587f159d657e44cee51b9b/app/channels/stimulus_reflex/channel.rb#L83Technical Description
- https://github.com/stimulusreflex/stimulus_reflex/commit/538582d240439aab76066c72335ea92096cd0c7fPatch
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.4.2Product, Release Notes
- https://github.com/stimulusreflex/stimulus_reflex/releases/tag/v3.5.0.rc4Product, Release Notes
- https://github.com/stimulusreflex/stimulus_reflex/security/advisories/GHSA-f78j-4w3g-4q65Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.