Vulnerability in Jinja Templating Engine Exposes Applications

CVE-2024-56326

What is CVE-2024-56326?

CVE-2024-56326 is a vulnerability in the Jinja templating engine, widely used in web applications for rendering templates. This weakness arises from an oversight in the sandboxing mechanism that detects calls to a particular formatting method. If exploited, the vulnerability allows an attacker who has control over the content of a Jinja template to execute arbitrary Python code. This poses a significant risk, especially for applications that execute untrusted templates, as it can lead to unauthorized access and manipulation of the application.

Technical Details

The flaw exists in versions of Jinja prior to 3.1.5, where the sandbox environment inadequately restricts certain operations. Attackers can exploit this vulnerability by leveraging custom filters not built into Jinja, which may indirectly enable them to call the str.format method in a way that escapes the intended sandbox environment. With access to this capability, malicious actors can execute arbitrary Python code within the context of the application, leading to potentially severe consequences for system security.

Potential impact of CVE-2024-56326

1. Arbitrary Code Execution: The most significant impact of this vulnerability is the potential for arbitrary code execution, allowing attackers to execute malicious code within the affected application, potentially leading to system compromise.

2. Data Breaches: Exploitation can result in unauthorized access to sensitive data stored or processed by the application, leading to data breaches and the exposure of personally identifiable information (PII) or confidential business information.

3. Application Integrity Compromise: An attacker can use this vulnerability to manipulate application logic, which may compromise the integrity of the application itself, impacting functionality and potentially leading to further security vulnerabilities.

News Articles

Linux Security

CVE-2024-56326

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