CVE-2018-6010: Yii Framework reflected Cross-site Scripting
Summary
CVE-2018-6010: Yii Framework reflected Cross-site Scripting. Affects yiisoft/yii2 versions >= 2.0.0, < 2.0.14. Fixed in 2.0.14. How to fix ↓
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Background
Yii Framework is a high-performance PHP framework used for developing web applications. It provides a set of tools and features to simplify the development process and enhance application security. The framework is widely adopted and has a large community of developers contributing to its continuous improvement. However, Yii Framework versions before 2.0.14 are vulnerable to reflected cross-site scripting (XSS) attacks, which can lead to the disclosure of sensitive information or the execution of malicious code.
Vulnerability Detail
The vulnerability in Yii Framework arises from the way exception messages are handled and the error handler page in non-debug mode. Attackers can exploit this vulnerability to inject malicious scripts into the application, which are then executed in the context of the victim's browser. This can lead to various consequences, such as stealing sensitive information, performing actions on behalf of the victim, or spreading malware. The affected files include base/ErrorHandler.php, log/Dispatcher.php, and views/errorHandler/exception.php.
How To Fix
Minimum fixed version
2.0.14
This is the first release that contains the fix.
composer require yiisoft/yii2:2.0.14Tip — 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, users can apply a temporary workaround by modifying the affected files to sanitize user input and prevent the execution of malicious scripts. Here is an example of how to sanitize user input in the ErrorHandler.php file:
// Before:
$message = $exception->getMessage();
// After:
$message = htmlspecialchars($exception->getMessage(), ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
Please note that this workaround is not a permanent solution and should be replaced with the official fix as soon as possible.
Conclusion
The Yii Framework reflected cross-site scripting vulnerability (CVE-2018-6010) can have serious security implications for web applications built on this framework. It is crucial for Yii Framework users to upgrade to version 2.0.14 or later to mitigate the risk of XSS attacks. Applying the temporary workaround can provide some protection, but it should be replaced with the official fix as soon as possible. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for yiisoft/yii2 →
FAQ
Yii Framework is a PHP framework used for developing web applications. It provides a set of tools and features to simplify the development process and enhance application security.
Reflected cross-site scripting (XSS) is a type of security vulnerability where an attacker injects malicious scripts into a website, which are then executed in the context of the victim's browser. This can lead to various consequences, such as stealing sensitive information or performing actions on behalf of the victim.
To fix the XSS vulnerability in Yii Framework, you should upgrade to version 2.0.14 or later. The latest version includes patches and security enhancements that mitigate the risk of reflected XSS attacks.
Yes, if upgrading to the latest version is not immediately feasible, you can apply a temporary workaround by modifying the affected files to sanitize user input and prevent the execution of malicious scripts. However, this workaround should be replaced with the official fix as soon as possible.
You can find more information about Yii Framework security on the official Yii Framework website and the Yii Framework GitHub repository. Additionally, you can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software.
References
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