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Ubuntu Security Notice USN-5204-1
January 05, 2022

python-django vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Django.

Software Description:
- python-django: High-level Python web development framework

Details:

Chris Bailey discovered that Django incorrectly handled evaluating
submitted passwords. A remote attacker could possibly use this issue to
consume resources, resulting in a denial of service. (CVE-2021-45115)

Dennis Brinkrolf discovered that Django incorrectly handled the dictsort
template filter. A remote attacker could possibly use this issue to obtain
sensitive information. (CVE-2021-45116)

Dennis Brinkrolf discovered that Django incorrectly handled certain file
names. A remote attacker could possibly use this issue to save files to
arbitrary filesystem locations. (CVE-2021-45452)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.10:
  python3-django                  2:2.2.24-1ubuntu1.2

Ubuntu 21.04:
  python3-django                  2:2.2.20-1ubuntu0.4

Ubuntu 20.04 LTS:
  python3-django                  2:2.2.12-1ubuntu0.9

Ubuntu 18.04 LTS:
  python-django                   1:1.11.11-1ubuntu1.15
  python3-django                  1:1.11.11-1ubuntu1.15

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5204-1
  CVE-2021-45115, CVE-2021-45116, CVE-2021-45452

Package Information:
  https://launchpad.net/ubuntu/+source/python-django/2:2.2.24-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/python-django/2:2.2.20-1ubuntu0.4
  https://launchpad.net/ubuntu/+source/python-django/2:2.2.12-1ubuntu0.9
  https://launchpad.net/ubuntu/+source/python-django/1:1.11.11-1ubuntu1.15