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Ubuntu Security Notice USN-4902-1
April 06, 2021

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Django could be made to overwrite files.

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

Details:

Dennis Brinkrolf discovered that Django incorrectly handled certain
filenames. A remote attacker could possibly use this issue to create or
overwrite files in unexpected directories.

Update instructions:

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

Ubuntu 20.10:
  python3-django                  2:2.2.16-1ubuntu0.3

Ubuntu 20.04 LTS:
  python3-django                  2:2.2.12-1ubuntu0.5

Ubuntu 18.04 LTS:
  python-django                   1:1.11.11-1ubuntu1.12
  python3-django                  1:1.11.11-1ubuntu1.12

Ubuntu 16.04 LTS:
  python-django                   1.8.7-1ubuntu5.15
  python3-django                  1.8.7-1ubuntu5.15

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

References:
  https://ubuntu.com/security/notices/USN-4902-1
  CVE-2021-28658

Package Information:
  https://launchpad.net/ubuntu/+source/python-django/2:2.2.16-1ubuntu0.3
  https://launchpad.net/ubuntu/+source/python-django/2:2.2.12-1ubuntu0.5
  https://launchpad.net/ubuntu/+source/python-django/1:1.11.11-1ubuntu1.12
  https://launchpad.net/ubuntu/+source/python-django/1.8.7-1ubuntu5.15