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                              CERT-Renater

                  Note d'Information No. 2020/VULN550
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DATE                : 02/10/2020

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Django versions prior to 3.1.1,
                                       3.0.10, 2.2.16.

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https://www.djangoproject.com/weblog/2020/sep/01/security-releases/
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Django security releases issued: 3.1.1, 3.0.10 and 2.2.16
Posted by Carlton Gibson on septembre 1, 2020

In accordance with our security release policy, the Django team is
issuing Django 3.1.1, Django 3.0.10 and Django 2.2.16. These releases
address the security issue detailed below. We encourage all users of
Django to upgrade as soon as possible.


CVE-2020-24583: Incorrect permissions on intermediate-level directories
on Python 3.7+

On Python 3.7 and above, FILE_UPLOAD_DIRECTORY_PERMISSIONS mode was not
applied to intermediate-level directories created in the process of
uploading files and to intermediate-level collected static directories
when using the collectstatic management command.

You should review and manually fix permissions on existing intermediate-
level directories.


CVE-2020-24584: Permission escalation in intermediate-level directories
of the file system cache on Python 3.7+

On Python 3.7 and above, the intermediate-level directories of the file
system cache had the system's standard umask rather than 0o077 (no group
or others permissions).


Affected supported versions

     Django master branch
     Django 3.1
     Django 3.0
     Django 2.2

Resolution

Patches to resolve the issue have been applied to Django's master branch
and the 3.1, 3.0, and 2.2 release branches. The patches may be obtained
from the following changesets:

CVE-2020-24583:

     On the master branch
     On the 3.1 release branch
     On the 3.0 release branch
     On the 2.2 release branch

CVE-2020-24584:

     On the master branch
     On the 3.1 release branch
     On the 3.0 release branch
     On the 2.2 release branch

The following releases have been issued:

     Django 3.1.1 (download Django 3.1.1 | 3.1.1 checksums)
     Django 3.0.10 (download Django 3.0.10 | 3.0.10 checksums)
     Django 2.2.16 (download Django 2.2.16 | 2.2.16 checksums)

The PGP key ID used for these releases is Carlton Gibson: E17DF5C82B4F9D00.


General notes regarding security reporting

As always, we ask that potential security issues be reported via private
email to security@djangoproject.com, and not via Django's Trac instance
or the django-developers list. Please see our security policies for
further information.


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+ CERT-RENATER       |    tel : 01-53-94-20-44          +
+ 23/25 Rue Daviel   |    fax : 01-53-94-20-41          +
+ 75013 Paris        |    email:cert@support.renater.fr +
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