CVE-2019-6257: elFinder Server Side Request Forgery (SSRF)
Summary
CVE-2019-6257: elFinder Server Side Request Forgery (SSRF). Affects studio-42/elfinder versions < 2.1.49. Fixed in 2.1.49. How to fix ↓
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Background
elFinder is a file manager for web applications that allows users to manage files and folders on a server. It provides a user-friendly interface for tasks such as uploading, downloading, and organizing files. However, elFinder versions before 2.1.46 are vulnerable to a Server Side Request Forgery (SSRF) attack. This vulnerability, identified as CVE-2019-6257, allows a malicious user to access the content of internal network resources. The vulnerability resides in the 'get_remote_contents()' function in 'php/elFinder.class.php'.
Vulnerability Detail
The SSRF vulnerability in elFinder allows an attacker to send crafted requests to the server, which can lead to unauthorized access to internal network resources. By exploiting this vulnerability, an attacker can bypass security measures and retrieve sensitive information or perform actions on behalf of the server. The impact of this vulnerability can be significant, as it exposes internal resources that are not intended to be accessible from the outside. The vulnerability has a CVSS score of 7.7, indicating a high severity level.
How To Fix
Minimum fixed version
2.1.49
This is the first release that contains the fix.
composer require studio-42/elfinder:2.1.49Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If updating elFinder is not immediately feasible, a temporary workaround can be implemented by disabling the 'get_remote_contents()' function in 'php/elFinder.class.php'. This can be achieved by commenting out or removing the relevant code block. However, it is important to note that this workaround only disables the vulnerable functionality and does not address the root cause of the vulnerability. Updating to the latest version is still recommended for a comprehensive fix.
Conclusion
The elFinder file manager is vulnerable to a Server Side Request Forgery (SSRF) attack, which can lead to unauthorized access to internal network resources. To mitigate this vulnerability, it is crucial to update elFinder to version 2.1.46 or later. Alternatively, a temporary workaround can be implemented by disabling the 'get_remote_contents()' function. For further assistance and support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for studio-42/elfinder →
FAQ
elFinder is a file manager for web applications that allows users to manage files and folders on a server. It provides a user-friendly interface for tasks such as uploading, downloading, and organizing files.
A Server Side Request Forgery (SSRF) vulnerability is a type of security vulnerability that allows an attacker to make requests from the server to other internal or external resources. In the case of elFinder, the SSRF vulnerability allows an attacker to access the content of internal network resources.
The SSRF vulnerability in elFinder can lead to unauthorized access to internal network resources. This can expose sensitive information, allow an attacker to perform actions on behalf of the server, and bypass security measures.
To fix the vulnerability, it is recommended to update elFinder to version 2.1.46 or later. This version includes a fix for the SSRF vulnerability. Updating the package will ensure that the vulnerable code is replaced with a secure version.
Yes, if updating elFinder is not immediately feasible, a temporary workaround can be implemented by disabling the 'get_remote_contents()' function in 'php/elFinder.class.php'. However, it is important to note that this workaround only disables the vulnerable functionality and does not address the root cause of the vulnerability. Updating to the latest version is still recommended for a comprehensive fix.
References
Related vulnerabilities
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