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             AUSCERT External Security Bulletin Redistribution

                    USN-4975-1: Django vulnerabilities
                                3 June 2021


        AusCERT Security Bulletin Summary

Product:           Django
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated      
                   Unauthorised Access      -- Remote/Unauthenticated      
                   Reduced Security         -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-33571 CVE-2021-33203 CVE-2021-32052

Original Bulletin: 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running Django check for an updated version of the software for 
         their operating system.

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USN-4975-1: Django vulnerabilities
02 June 2021

Several security issues were fixed in Django.

  o Ubuntu 21.04
  o Ubuntu 20.10
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS


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


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 )

Update instructions

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

Ubuntu 21.04

  o python3-django - 2:2.2.20-1ubuntu0.2

Ubuntu 20.10

  o python3-django - 2:2.2.16-1ubuntu0.5

Ubuntu 20.04

  o python3-django - 2:2.2.12-1ubuntu0.7

Ubuntu 18.04

  o python3-django - 1:1.11.11-1ubuntu1.14
  o python-django - 1:1.11.11-1ubuntu1.14

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


  o CVE-2021-32052
  o CVE-2021-33571
  o CVE-2021-33203

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