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                              CERT-Renater

                   Note d'Information No. 2023/VULN239

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DATE                : 03/07/2023

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Django versions prior to 4.2.3,
                                   4.1.10, 3.2.20.

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https://www.djangoproject.com/weblog/2023/jul/03/security-releases/
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Django security releases issued: 4.2.3, 4.1.10, and 3.2.20
Posted by Mariusz Felisiak on juillet 3, 2023

In accordance with our security release policy, the Django team is
issuing Django 4.2.3, Django 4.1.10, and Django 3.2.20. These
releases addresses the security issue detailed below. We encourage
all users of Django to upgrade as soon as possible.


CVE-2023-36053: Potential regular expression denial of service
vulnerability in EmailValidator/URLValidator

EmailValidator and URLValidator were subject to potential regular
expression denial of service attack via a very large number of
domain name labels of emails and URLs.

Thanks Seokchan Yoon for reports.

This issue has severity "moderate" according to the Django security
policy.


Affected supported versions

     Django main branch
     Django 4.2
     Django 4.1
     Django 3.2


Resolution

Patches to resolve the issue have been applied to Django's main
branch and the 4.2, 4.1, and 3.2 release branches. The patches
may be obtained from the following changesets:

     On the main branch
     On the 4.2 release branch
     On the 4.1 release branch
     On the 3.2 release branch

The following releases have been issued:

     Django 4.2.3 (download Django 4.2.3 | 4.2.3 checksums)
     Django 4.1.10 (download Django 4.1.10 | 4.1.10 checksums)
     Django 3.2.20 (download Django 3.2.20 | 3.2.20 checksums)

The PGP key ID used for this release is Mariusz Felisiak:
2EF56372BA48CD1B.


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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