Debian: DLA-4030-1 moderate: python-django denial of service

The lack of upper-bound limit enforcement in IPv6 validation could
have led to a potential denial-of-service attack. The undocumented
and private clean_ipv6_address and is_valid_ipv6_address functions
were vulnerable, as was the GenericIPAddressField form field.

For Debian 11 bullseye, this problem has been fixed in version
2:2.2.28-1~deb11u5.

We recommend that you upgrade your python-django packages.

For the detailed security status of python-django please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/python-django

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS