Information disclosure in Djangoproject Channels
CVE-2020-35681
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/django/channels/releases (Third Party Advisory)
- channels.readthedocs.io/en/stable/releases/index.html (Release Notes, Vendor Advisory)
- channels.readthedocs.io/en/stable/releases/3.0.3.html (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-35681?
- CVE-2020-35681 is a high-severity vulnerability in Djangoproject Channels, classified under Information Disclosure. CVSS score: 7.4/10. Published 2021-02-22.
- How severe is CVE-2020-35681?
- High severity. CVSS v3 base score is 7.4 out of 10.