Denial-of-Service Vulnerability in Node-EJS Package
Summary
DEBIAN-CVE-2017-1000189: nodejs ejs version older than 2.5.5 is vulnerable to a denial-of-service due to weak input validation in the ejs.renderFile(). Affects node-ejs versions < 2.5.7-1. Fixed in 2.5.7-1. How to fix ↓
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Background
Node-EJS is a templating engine that allows developers to generate HTML markup with plain JavaScript. It is widely used in web applications to render dynamic content. The package is known for its simplicity and flexibility, making it a popular choice among developers. However, certain versions of Node-EJS are vulnerable to a denial-of-service attack due to weak input validation in the ejs.renderFile() function, which can lead to application crashes or unresponsiveness.
Vulnerability Detail
The vulnerability identified as DEBIAN-CVE-2017-1000189 affects Node-EJS versions prior to 2.5.5. It arises from insufficient input validation in the ejs.renderFile() method, allowing attackers to exploit this weakness by providing specially crafted input. This can result in a denial-of-service condition, causing the application to become unresponsive or crash, thereby impacting user experience and application availability.
How To Fix
Minimum fixed version
2.5.7-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade node-ejsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider implementing input validation on the data being passed to ejs.renderFile() to mitigate the risk of denial-of-service attacks. Ensure that inputs are sanitized and validated before processing.
Conclusion
In summary, the denial-of-service vulnerability in Node-EJS poses a significant risk to applications using affected versions. It is crucial to update to the patched version to ensure application stability and security. Additionally, implementing input validation can serve as a temporary measure to mitigate risks until an update can be performed.
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FAQ
The vulnerability is a denial-of-service issue caused by weak input validation in the ejs.renderFile() function.
Node-EJS versions prior to 2.5.5 are vulnerable to this issue.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
Update your Node-EJS package to version 2.5.7-1 or later using the command 'sudo apt-get install node-ejs=2.5.7-1'.
Yes, you can implement input validation on the data passed to ejs.renderFile() to reduce the risk of denial-of-service attacks.
References
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