Tiki Wiki CMS Groupware 24.0 grid.php PHP Object Injection – Torchsec
Tiki Wiki CMS Groupware <= 24.0 (grid.php) PHP Object Injection
Vulnerability
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[-] 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:
method="POST" enctype="multipart/form-data">
/>
[-] 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
Gloss