CVE-2023-43665
python-django: Denial-of-service possibility in django.utils.text.Truncator
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.
En Django 3.2 anterior a 3.2.22, 4.1 anterior a 4.1.12 y 4.2 anterior a 4.2.6, los métodos django.utils.text.Truncator chars() y palabras() (cuando se usan con html=True) están sujetos a un potencial Ataque DoS (denegación de servicio) a través de ciertas entradas con texto HTML muy largo y potencialmente mal formado. Los métodos chars() y palabras() se utilizan para implementar los filtros de plantilla truncatechars_html y truncatewords_html, que por tanto también son vulnerables. NOTA: este problema existe debido a una solución incompleta para CVE-2019-14232.
An inefficient regular expression complexity was found in Django. The text truncator regular expressions exhibit linear backtracking complexity, which can be slow, leading to a potential denial of service, given certain HTML inputs.
Wenchao Li discovered that the Django Truncator function incorrectly handled very long HTML input. A remote attacker could possibly use this issue to cause Django to consume resources, leading to a denial of service.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2023-09-20 CVE Reserved
- 2023-10-05 CVE Published
- 2024-08-02 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-1284: Improper Validation of Specified Quantity in Input
- CWE-1333: Inefficient Regular Expression Complexity
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2024/03/04/1 | Mailing List |
|
| https://security.netapp.com/advisory/ntap-20231221-0001 |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://docs.djangoproject.com/en/4.2/releases/security | 2024-05-01 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Djangoproject Search vendor "Djangoproject" | Django Search vendor "Djangoproject" for product "Django" | >= 3.2 < 3.2.22 Search vendor "Djangoproject" for product "Django" and version " >= 3.2 < 3.2.22" | - |
Affected
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| Djangoproject Search vendor "Djangoproject" | Django Search vendor "Djangoproject" for product "Django" | >= 4.1 < 4.1.12 Search vendor "Djangoproject" for product "Django" and version " >= 4.1 < 4.1.12" | - |
Affected
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| Djangoproject Search vendor "Djangoproject" | Django Search vendor "Djangoproject" for product "Django" | >= 4.2 < 4.2.6 Search vendor "Djangoproject" for product "Django" and version " >= 4.2 < 4.2.6" | - |
Affected
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| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 39 Search vendor "Fedoraproject" for product "Fedora" and version "39" | - |
Affected
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