// For flags

CVE-2024-28121

Reflex arbitrary method call in stimulus_reflex

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

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.

stimulus_reflex es un sistema para ampliar las capacidades de Rails y Stimulus interceptando las interacciones del usuario y pasándolas a Rails a través de websockets en tiempo real. En las versiones afectadas se pueden invocar más métodos de los esperados en instancias reflejas. Poder llamar a algunos de ellos tiene implicaciones de seguridad. Para invocar un reflejo, se envía un mensaje websocket con la siguiente forma: `\"target\":\"[class_name]#[method_name]\",\"args\":[]`. El servidor procederá a crear una instancia de `reflex` utilizando el `class_name` proporcionado siempre que extienda `StimulusReflex::Reflex`. Luego intenta llamar a "method_name" en la instancia con los argumentos proporcionados. Esto es problemático ya que `reflex.method method_name` puede contener más métodos que los especificados explícitamente por el desarrollador en su clase refleja. Un buen ejemplo es el método instance_variable_set. Esta vulnerabilidad ha sido parcheada en las versiones 3.4.2 y 3.5.0.rc4. Los usuarios que no puedan actualizar deben: consultar el aviso de respaldo de GHSA para obtener consejos de mitigación.

StimulusReflex versions 3.5.0 up to and including 3.5.0.rc2 and 3.5.0.pre10 suffer from an arbitrary code execution vulnerability.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2024-03-04 CVE Reserved
  • 2024-03-12 CVE Published
  • 2024-03-14 EPSS Updated
  • 2024-03-14 First Exploit
  • 2025-02-13 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Stimulusreflex
Search vendor "Stimulusreflex"
 Stimulus Reflex
Search vendor "Stimulusreflex" for product "Stimulus Reflex"
 < 3.4.2
Search vendor "Stimulusreflex" for product "Stimulus Reflex" and version " < 3.4.2"
en
Affected