CVE-2017-11516 Explained : Impact and Mitigation
Learn about CVE-2017-11516, a Cross-Site Scripting (XSS) vulnerability in Yii Framework 2.0.12 that allows attackers to execute malicious scripts. Find mitigation steps and preventive measures here.
In the Yii Framework 2.0.12, a Cross-Site Scripting (XSS) vulnerability exists in the file exception.php within framework/views/errorHandler. This vulnerability impacts the exception screen specifically when the debug mode is activated due to mishandling of $exception->errorInfo.
Understanding CVE-2017-11516
This CVE entry highlights a security issue in Yii Framework 2.0.12 related to XSS vulnerability.
What is CVE-2017-11516?
The vulnerability in Yii Framework 2.0.12 allows for XSS attacks on the exception screen when debug mode is on, caused by improper handling of $exception->errorInfo.
The Impact of CVE-2017-11516
The vulnerability can be exploited by attackers to execute malicious scripts in the context of the user's browser, potentially leading to unauthorized actions or data theft.
Technical Details of CVE-2017-11516
This section delves into the technical aspects of the CVE.
Vulnerability Description
The XSS vulnerability in Yii Framework 2.0.12 arises from the mishandling of $exception->errorInfo in the file exception.php within framework/views/errorHandler.
Affected Systems and Versions
- Product: Yii Framework 2.0.12
- Vendor: Yii
- Versions: All versions up to 2.0.12
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting malicious scripts into the exception screen when the debug mode is enabled, taking advantage of the mishandling of $exception->errorInfo.
Mitigation and Prevention
Protecting systems from CVE-2017-11516 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable debug mode in Yii Framework to prevent exploitation of the vulnerability.
- Regularly monitor and update the framework to the latest secure version.
Long-Term Security Practices
- Implement input validation and output encoding to mitigate XSS vulnerabilities.
- Educate developers on secure coding practices to prevent similar issues in the future.
- Conduct regular security audits and penetration testing to identify and address vulnerabilities.
- Stay informed about security updates and patches released by Yii.
Patching and Updates
Ensure timely application of security patches and updates provided by Yii to address the XSS vulnerability in Yii Framework 2.0.12.