CVE-2020-19316: OS Command Injection in Laravel Framework
Summary
CVE-2020-19316: OS Command Injection in Laravel Framework. Affects laravel/framework versions < 5.8.17. Fixed in 5.8.17. How to fix ↓
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Background
The Laravel Framework is a popular PHP web application framework used for developing robust and scalable applications. It provides a wide range of features and tools to simplify the development process. However, versions prior to 5.8.17 are vulnerable to an OS command injection vulnerability in the 'link' function of the 'Filesystem.php' file. This vulnerability allows an attacker to execute arbitrary commands on the server, potentially leading to unauthorized access, data leakage, or remote code execution.
Vulnerability Detail
The OS command injection vulnerability in Laravel Framework arises due to insufficient input validation in the 'link' function of the 'Filesystem.php' file. An attacker can exploit this vulnerability by injecting malicious commands through user-controlled input, which are then executed by the server. This can be achieved by manipulating the input parameters passed to the 'link' function. The impact of this vulnerability can be severe, as it allows an attacker to execute arbitrary commands with the privileges of the web server user, potentially compromising the entire system.
How To Fix
Minimum fixed version
5.8.17
This is the first release that contains the fix.
composer require laravel/framework:5.8.17Tip — 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, developers can implement input validation and sanitization measures to mitigate the risk of OS command injection. This can be achieved by using appropriate validation functions and filters to ensure that user-controlled input does not contain any malicious commands. Additionally, it is recommended to restrict the execution of commands to a limited set of known safe commands or use whitelisting to only allow specific inputs.
Conclusion
The OS command injection vulnerability in Laravel Framework poses a significant risk to the security and integrity of web applications. It is crucial for developers to promptly upgrade to the latest version of Laravel Framework (5.8.17 or later) to mitigate this vulnerability. Additionally, implementing input validation and sanitization measures can provide temporary mitigation until the upgrade is performed. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The OS command injection vulnerability in Laravel Framework allows an attacker to execute arbitrary commands on the server, potentially leading to unauthorized access, data leakage, or remote code execution.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Simply upload your 'composer.lock' file and Vulert will analyze it for any open-source vulnerabilities, including this OS command injection vulnerability.
If upgrading to the latest version is not immediately feasible, you can implement input validation and sanitization measures to mitigate the risk of OS command injection. Ensure that user-controlled input is properly validated and sanitized to prevent the execution of malicious commands.
At the time of this advisory, there are no known public exploits specifically targeting this vulnerability in Laravel Framework. However, it is crucial to apply the recommended fixes and security patches to prevent any potential exploitation.
You can find more information about this vulnerability, including the technical details and the patch, in the GitHub Advisory Database (https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/01/GHSA-w2pm-r78h-4m7v/GHSA-w2pm-r78h-4m7v.json).
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