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GHSA-v542-8q9x-cffc

Django Channels leakage of session identifiers using legacy AsgiHandler

Source: GitHub Advisory Database (reviewed) High CVE-2020-35681

Packages

EcosystemPackageAffectedFixed in
PyPI channels >= 3.0.0, < 3.0.3 3.0.3

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.