An issue was discovered in Django 1.11.x before 1.11.23, 2.1.x before 2.1.11, and 2.2.x before 2.2.4. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.
The product does not properly control the allocation and maintenance of a limited resource.
| Link | Tags |
|---|---|
| https://docs.djangoproject.com/en/dev/releases/security/ | patch vendor advisory |
| https://groups.google.com/forum/#%21topic/django-announce/jIoju2-KLDs | |
| https://www.djangoproject.com/weblog/2019/aug/01/security-releases/ | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00006.html | third party advisory vendor advisory |
| https://seclists.org/bugtraq/2019/Aug/15 | mailing list |
| https://www.debian.org/security/2019/dsa-4498 | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00025.html | vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STVX7X7IDWAH5SKE6MBMY3TEI6ZODBTK/ | vendor advisory |
| https://security.netapp.com/advisory/ntap-20190828-0002/ | |
| https://security.gentoo.org/glsa/202004-17 | vendor advisory |
| http://www.openwall.com/lists/oss-security/2023/10/04/6 | mailing list |
| http://www.openwall.com/lists/oss-security/2024/03/04/1 | mailing list |