module

elFinder PHP Connector exiftran Command Injection

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Disclosed
2019-02-26
Created
2019-03-19

Description

This module exploits a command injection vulnerability in elFinder
versions prior to 2.1.48.

The PHP connector component allows unauthenticated users to upload
files and perform file modification operations, such as resizing and
rotation of an image. The file name of uploaded files is not validated,
allowing shell metacharacters.

When performing image operations on JPEG files, the filename is passed
to the `exiftran` utility without appropriate sanitization, causing
shell commands in the file name to be executed, resulting in remote
command injection as the web server user.

The PHP connector is not enabled by default.

The system must have `exiftran` installed and in `$PATH`.

This module has been tested successfully on elFinder versions 2.1.47,
2.1.20 and 2.1.16 on Ubuntu.

Authors

Thomas Chauchefoin
q3rv0
bcoles bcoles@gmail.com

Platform

PHP

Architectures

php

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/unix/webapp/elfinder_php_connector_exiftran_cmd_injection
    msf exploit(elfinder_php_connector_exiftran_cmd_injection) > show targets
        ...targets...
    msf exploit(elfinder_php_connector_exiftran_cmd_injection) > set TARGET < target-id >
    msf exploit(elfinder_php_connector_exiftran_cmd_injection) > show options
        ...show and set options...
    msf exploit(elfinder_php_connector_exiftran_cmd_injection) > exploit
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