Studio 42 elFinder 2.1.64 is vulnerable to Incorrect Access Control. Copying files with an unauthorized extension between server directories allows an arbitrary attacker to expose secrets, perform RCE, etc.

joinPath in elFinderVolumeLocalFileSystem.class.php in elFinder before 2.1.62 allows path traversal in the PHP LocalVolumeDriver connector.

Impact

We recently fixed several vulnerabilities affect elFinder 2.1.58. These vulnerabilities can allow an attacker to execute arbitrary code and commands on the server hosting the elFinder PHP connector, even with the minimal configuration.

Patches

The issues were addressed in our last release, 2.1.59.

Workarounds

If you can't update to 2.1.59, make sure your connector is not exposed without authentication.

Reference

Further technical details will be disclosed on https://blog.sonarsource.com/tag/security after some time.

For more information

If you have any questions or comments about this advisory, you can contact: - The original reporters, by sending an email to vulnerability.research@sonarsource.com; - The maintainers, by opening an issue on this repository.

Impact

Before elFinder 2.1.58, the upload filter did not disallow the upload of .phar files. As several Linux distributions are now shipping Apache configured in a way it will process these files as PHP scripts, attackers could gain arbitrary code execution on the server hosting the PHP connector (even in minimal configuration).

Patches

The issue has been addressed with https://github.com/Studio-42/elFinder/commit/75ea92decc16a5daf7f618f85dc621d1b534b5e1, associating .phar files to the right MIME type. Unless explicitly allowed in the configuration, such files cannot be uploaded anymore. This patch is part of the last release of elFinder, 2.1.58.

Workarounds

If you can't update to 2.1.58, make sure your connector is not exposed without authentication.

Important tips

Server-side scripts can often be created as text files. Currently, elFinder has an appropriate MIME type set for file extensions that are generally runnable on a web server.

However, the server has various settings. In some cases, the executable file may be judged as "text/plain". Therefore, elFinder installers should understand the extensions that can be executed on the web server where elFinder is installed, and check if there are any missing items in the elFinder settings.

The elFinder PHP connector has an option "additionalMimeMap" that specifies the MIME type for each extension. See #3295(comment) for more information.

References

- https://snyk.io/vuln/composer:studio-42%2Felfinder - https://github.com/Studio-42/elFinder/issues/3295 - Further technical details will be disclosed on https://blog.sonarsource.com/tag/security after some time.

For more information

If you have any questions or comments about this advisory, you can contact: - The original reporters, by sending an email to support [at] snyk.io or vulnerability.research [at] sonarsource.com; - The maintainers, by opening an issue on this repository.

php/elFinder.class.php in elFinder before 2.1.45 leaks information if PHP's curl extension is enabled and safemode or openbasedir is not set.

elFinder Path Traversal vulnerability

Directory Traversal in Studio 42 elFinder

elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.67, elFinder contains a command injection vulnerability in the resize command. The bg (background color) parameter is accepted from user input and passed through image resize/rotate processing. In configurations that use the ImageMagick CLI backend, this value is incorporated into shell command strings without sufficient escaping. An attacker able to invoke the resize command with a crafted bg value may achieve arbitrary command execution as the web server process user. This vulnerability is fixed in 2.1.67.

elFinder before 2.1.48 has a command injection vulnerability in the PHP connector.

A Server Side Request Forgery (SSRF) vulnerability in elFinder before 2.1.46 could allow a malicious user to access the content of internal network resources. This occurs in getremotecontents() in php/elFinder.class.php.

Studio 42 elFinder allows stored XSS

A File Upload vulnerability exists in Studio-42 elFinder 2.0.4 to 2.1.59 via connector.minimal.php, which allows a remote malicious user to upload arbitrary files and execute PHP code.

In Studio-42 elFinder 2.1.60, there is a vulnerability that causes remote code execution through file name bypass for file upload.

connector.minimal.php in std42 elFinder through 2.1.60 is affected by path traversal. This allows unauthenticated remote attackers to read, write, and browse files outside the configured document root. This is due to improper handling of absolute file paths.