Denial-of-Service Vulnerability in Node.js EJS Package (CVE-2017-1000189)
Summary
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 across 2 version ranges.
< 2.5.7-1
< 49264e0037e313a0a3e033450b5c184112516d8f
Fixed in 2.5.7-1. How to fix ↓
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Background
The EJS (Embedded JavaScript) package is a popular templating engine used in Node.js applications to generate HTML markup with plain JavaScript. It allows developers to create dynamic web pages by embedding JavaScript code within HTML. EJS is widely utilized due to its simplicity and flexibility, making it a common choice for rendering views in web applications. However, certain versions of EJS are vulnerable to a denial-of-service attack due to inadequate input validation in the ejs.renderFile() function, which can lead to application crashes or unresponsiveness.
Vulnerability Detail
The vulnerability identified as CVE-2017-1000189 affects versions of the EJS package prior to 2.5.5. It arises from weak input validation in the ejs.renderFile() method, allowing attackers to craft specific inputs that can overwhelm the server, leading to a denial-of-service condition. This can result in the application becoming unresponsive, affecting user experience and potentially causing downtime. The severity of this vulnerability is rated with a CVSS score of 7.5, indicating a high risk to applications using affected versions of EJS.
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 upgrading is not feasible, consider implementing input validation on the data being passed to ejs.renderFile() to mitigate the risk of denial-of-service attacks. This can involve sanitizing inputs or limiting the size of the input data.
Conclusion
The CVE-2017-1000189 vulnerability in the EJS package poses a significant risk to applications using affected versions. It is crucial to upgrade to version 2.5.7 or later to mitigate the risk of denial-of-service attacks. Regular monitoring and validation of inputs can further enhance application security.
See every vulnerability recorded for node-ejs →
FAQ
CVE-2017-1000189 is a vulnerability in the EJS templating engine that can lead to denial-of-service attacks due to weak input validation.
EJS versions older than 2.5.5 are vulnerable to this issue.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software without needing to install anything. Simply upload your manifest file like package-lock.json.
Implement input validation on the data passed to ejs.renderFile() as a temporary workaround to reduce the risk of denial-of-service attacks.
The CVSS score of CVE-2017-1000189 is 7.5, indicating a high severity level.
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