Cross-Site Scripting Vulnerability in Node-Express Package
Summary
DEBIAN-CVE-2014-6393: The Express web framework before 3.11 and 4.x before 4.5 for Node.js does not provide a charset field in HTTP Content-Type headers in 400 level responses, which might allow remote attackers to conduct cross-site scriptin... Affects node-express versions < 4.16.4-1. Fixed in 4.16.4-1. How to fix ↓
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Background
Node-Express is a popular web framework for Node.js, designed to simplify the process of building web applications and APIs. It provides robust features for web and mobile applications, including routing, middleware support, and a variety of HTTP utility methods. However, prior to version 4.16.4-1, Node-Express lacked a charset field in HTTP Content-Type headers for 400 level responses, exposing applications to potential cross-site scripting (XSS) attacks.
Vulnerability Detail
The vulnerability identified as DEBIAN-CVE-2014-6393 affects the Express web framework versions before 3.11 and 4.x before 4.5. The absence of a charset field in HTTP Content-Type headers in 400 level responses can allow remote attackers to exploit this flaw, potentially leading to cross-site scripting (XSS) attacks. This vulnerability arises from the framework's failure to properly handle character encoding, which can be manipulated by attackers to inject malicious scripts into web applications.
How To Fix
Minimum fixed version
4.16.4-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade node-expressTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can implement input validation and sanitization on user inputs to mitigate the risk of XSS attacks. Additionally, ensure that your application properly handles character encoding in HTTP responses.
Conclusion
The vulnerability DEBIAN-CVE-2014-6393 in the Node-Express package poses a significant risk of cross-site scripting attacks due to improper handling of HTTP Content-Type headers. It is crucial to update to the patched version and implement additional security measures to safeguard your application.
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FAQ
The vulnerability allows for potential cross-site scripting (XSS) attacks due to the lack of a charset field in HTTP Content-Type headers in 400 level responses.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If left unaddressed, this vulnerability can allow attackers to inject malicious scripts into your web application, potentially compromising user data and application integrity.
Yes, the vulnerability can be fixed by updating the Node-Express package to version 4.16.4-1 or later.
In addition to updating the package, implement input validation and sanitization, and ensure proper handling of character encoding in your application.
References
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