CVE-2019-15486: Cross-site Scripting in django-js-reverse
Summary
CVE-2019-15486: Cross-site Scripting in django-js-reverse. Affects django-js-reverse versions < 0.9.1. Fixed in 0.9.1. How to fix ↓
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Background
The django-js-reverse package is a Python package available on PyPI that provides a way to use Django URL reversing directly in JavaScript code. It allows developers to generate JavaScript code that can be used to reverse Django URLs without hardcoding them. This package is commonly used in Django web applications to simplify URL handling and improve maintainability. However, versions of django-js-reverse prior to 0.9.1 are vulnerable to a cross-site scripting (XSS) attack.
Vulnerability Detail
The vulnerability in django-js-reverse (aka Django JS Reverse) before 0.9.1 is due to insufficient input sanitization. An attacker can exploit this vulnerability by injecting malicious JavaScript code into the generated JavaScript code, which is then executed in the context of the victim's browser. This can lead to various security issues, such as session hijacking, defacement of web pages, or theft of sensitive information. The vulnerability has a CVSS score of 6.1, indicating a moderate severity level.
How To Fix
Minimum fixed version
0.9.1
This is the first release that contains the fix.
pip install --upgrade "django-js-reverse==0.9.1"Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading to the latest version is not immediately feasible, a temporary workaround is to manually sanitize any user-generated input that is used in the generation of JavaScript code. This can be done by using appropriate input validation and escaping techniques to ensure that any potentially malicious code is neutralized. Here is an example of how to sanitize user input in the affected function:
def generate_js(user_input):
sanitized_input = escape(user_input)
# Rest of the code
Conclusion
In conclusion, the django-js-reverse package versions prior to 0.9.1 are vulnerable to cross-site scripting (XSS) attacks. It is crucial for developers to upgrade to the latest version or apply the provided workaround to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
django-js-reverse is a Python package that allows developers to generate JavaScript code for reversing Django URLs.
This vulnerability allows an attacker to inject malicious JavaScript code into the generated JavaScript code, leading to potential security issues such as session hijacking or theft of sensitive information.
The CVSS score of this vulnerability is 6.1, indicating a moderate severity level.
To fix this vulnerability, it is recommended to upgrade to version 0.9.1 or later of django-js-reverse.
Yes, a temporary workaround is to manually sanitize user-generated input used in the generation of JavaScript code.
References
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