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django

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.

CVE-2023-43665 identifies a denial of service vulnerability in the Django web framework affecting versions 3.2 prior to 3.2.22, 4.1 prior to 4.1.12, and 4.2 prior to 4.2.6. The vulnerability exists in the django.utils.text.Truncator class, specifically in the chars() and words() methods when invoked with the html=True parameter. These methods are responsible for truncating text while preserving HTML structure and are used by the truncatechars_html and truncatewords_html template filters. The flaw allows an attacker to craft inputs containing excessively long or malformed HTML content that triggers excessive processing, leading to high CPU and memory usage, effectively causing a denial of service. This issue stems from an incomplete remediation of a previous vulnerability (CVE-2019-14232), indicating that the original fix did not fully address the underlying problem. No authentication or user interaction is required to exploit this vulnerability, making it accessible to remote attackers who can submit specially crafted HTTP requests to vulnerable Django applications. Although no active exploits have been reported, the vulnerability poses a significant risk to web services relying on affected Django versions. The impact primarily affects availability by potentially rendering web applications unresponsive or crashing them due to resource exhaustion. The vulnerability is particularly relevant for web applications that use the vulnerable template filters to truncate HTML content dynamically, a common practice in content management and user-generated content platforms.

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CVE-2023-43665: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-43665: n/a

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