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USN-4975-1: Django vulnerabilities

2 June 2021

Several security issues were fixed in Django.

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Details

It was discovered that the Django URLValidator function incorrectly handled
newlines and tabs. A remote attacker could possibly use this issue to
perform a header injection attack. This issue only affected Ubuntu 20.04
LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-32052)

Rasmus Lerchedahl Petersen and Rasmus Wriedt Larsen discovered that Django
incorrectly handled path sanitation in admindocs. A remote attacker could
possibly use this issue to determine the existence of arbitrary files and
in certain configurations obtain their contents. (CVE-2021-33203)

It was discovered that Django incorrectly handled IPv4 addresses with
leading zeros. A remote attacker could possibly use this issue to perform a
wide variety of attacks, including bypassing certain access restrictions.
(CVE-2021-33571)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 21.04
Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04

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

Related notices

  • USN-5373-1: python3-django, python-django, python-django-common, python-django-doc
  • USN-5373-2: python3-django, python-django, python-django-common, python-django-doc
  • USN-4975-2: python3-django, python-django, python-django-common, python-django-doc