Django 3.2.11 release notes

January 4, 2022

Django 3.2.11 fixes one security issue with severity “medium” and two security
issues with severity “low” in 3.2.10.

CVE-2021-45115: Denial-of-service possibility in UserAttributeSimilarityValidator

UserAttributeSimilarityValidator incurred significant overhead
evaluating submitted password that were artificially large in relative to the
comparison values. On the assumption that access to user registration was
unrestricted this provided a potential vector for a denial-of-service attack.

In order to mitigate this issue, relatively long values are now ignored by
UserAttributeSimilarityValidator.

This issue has severity “medium” according to the Django security policy.

CVE-2021-45116: Potential information disclosure in dictsort template filter

Due to leveraging the Django Template Language’s variable resolution logic, the
dictsort template filter was potentially vulnerable to information
disclosure or unintended method calls, if passed a suitably crafted key.

In order to avoid this possibility, dictsort now works with a restricted
resolution logic, that will not call methods, nor allow indexing on
dictionaries.

As a reminder, all untrusted user input should be validated before use.

This issue has severity “low” according to the Django security policy.

CVE-2021-45452: Potential directory-traversal via Storage.save()

Storage.save() allowed directory-traversal if directly passed suitably
crafted file names.

This issue has severity “low” according to the Django security policy.