Ubuntu 21.04 USN-4975-1 Critical: Django Path Sanitation Flaws

ubuntu

June 2, 2021

Several security issues were fixed in Django.

Summary

Several security issues were fixed in Django.

Software Description:

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

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)

Topics Covered

security advisory critical remote access python-django header injection path sanitation

Update Instructions

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

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

Ubuntu 20.10:
  python3-django                  2:2.2.16-1ubuntu0.5

Ubuntu 20.04 LTS:
  python3-django                  2:2.2.12-1ubuntu0.7

Ubuntu 18.04 LTS:
  python-django                   1:1.11.11-1ubuntu1.14
  python3-django                  1:1.11.11-1ubuntu1.14

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