CVE-2020-35681

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Django Channels 3.x before 3.0.3 allows remote attackers to obtain sensitive information from a different request scope. The legacy channels.http.AsgiHandler class, used for handling HTTP type requests in an ASGI environment prior to Django 3.0, did not correctly separate request scopes in Channels 3.0. In many cases this would result in a crash but, with correct timing, responses could be sent to the wrong client, resulting in potential leakage of session identifiers and other sensitive data. Note that this affects only the legacy Channels provided class, and not Django's similar ASGIHandler, available from Django 3.0.

Django Channels versiones 3.x anteriores a 3.0.3, permite a atacantes remotos obtener información confidencial de un alcance de petición diferente. La clase channels.http.AsgiHandler legacy, usada para manejar peticiones de tipo HTTP en un entorno ASGI anterior a Django versión 3.0, no separaba correctamente los ámbitos de petición en Channels versión 3.0. En muchos casos, esto resulta en un bloqueo, pero, con el tiempo correcto, las respuestas podrían ser enviadas al cliente equivocado, resultando en una posible filtración de identificadores de sesión y otros datos confidenciales. Note que esto afecta solo a la clase legacy proporcionada de Channels, y no al ASGIHandler similar de Django, disponible en Django versión 3.0

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-24 CVE Reserved
2021-02-22 CVE Published
2023-11-07 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (3)

URL	Tag	Source
https://github.com/django/channels/releases	Third Party Advisory

URL	Date	SRC
https://channels.readthedocs.io/en/stable/releases/3.0.3.html	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://channels.readthedocs.io/en/stable/releases/index.html	2021-02-26

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Djangoproject Search vendor "Djangoproject"		Channels Search vendor "Djangoproject" for product "Channels"				>= 3.0.0 < 3.0.3 Search vendor "Djangoproject" for product "Channels" and version " >= 3.0.0 < 3.0.3"		-		Affected