Remote Code Execution Vulnerability in Node.js EJS Package (CVE-2017-1000228)
Summary
CVE-2017-1000228: nodejs ejs versions older than 2.5.3 is vulnerable to remote code execution due to weak input validation in ejs.renderFile() function. Affects node-ejs across 2 version ranges.
< 2.5.7-1
< 89f006525f018ee4bd62b3d7527c81196cd7bea6
Fixed in 2.5.7-1. How to fix ↓
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Background
EJS (Embedded JavaScript) is a templating engine that allows developers to generate HTML markup with plain JavaScript. It is widely used in Node.js applications for rendering views. The EJS package provides features such as template inheritance, partials, and includes, making it a popular choice for web developers. However, certain versions of EJS prior to 2.5.3 are susceptible to a critical vulnerability that can lead to remote code execution due to insufficient input validation.
Vulnerability Detail
The vulnerability identified as CVE-2017-1000228 arises from weak input validation in the ejs.renderFile() function. This flaw allows an attacker to execute arbitrary code on the server by manipulating the input to this function. If exploited, this vulnerability can lead to severe consequences, including unauthorized access to sensitive data, complete system compromise, and potential damage to the application’s integrity. The CVSS score for this vulnerability is 9.8, indicating a critical level of severity.
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 upgrading is not immediately possible, a temporary workaround is to implement strict input validation in your application before passing data to the ejs.renderFile() function. This can help mitigate the risk of code execution by ensuring that only safe and expected inputs are processed.
Conclusion
The CVE-2017-1000228 vulnerability in the EJS package poses a significant risk to applications using affected versions. It is crucial for developers to upgrade to the latest version to protect their applications from potential exploitation. Regular monitoring and vulnerability assessment using tools like Vulert can help maintain application security.
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FAQ
CVE-2017-1000228 is a vulnerability in the EJS templating engine that allows for remote code execution due to weak input validation.
EJS versions older than 2.5.3 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 needing to sign up.
Exploitation of this vulnerability can lead to unauthorized access, data breaches, and complete system compromise.
The recommended action is to upgrade to EJS version 2.5.7 or later to eliminate the vulnerability.
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