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Cross-Site Request Forgery on Oxwall

Advisory ID:HTB23266
Vulnerable Versions:1.7.4 and probably prior
Tested Version:1.7.4
Advisory Publication:July 1, 2015 [without technical details]
Vendor Notification:July 1, 2015
Vendor Fix:September 8, 2015
Public Disclosure:October 22, 2015
Latest Update:October 21, 2015
Vulnerability Type:Cross-Site Request Forgery [CWE-352]
CVE Reference:CVE-2015-5534
Risk Level:High
CVSSv3 Base Score:7.1 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L]
CVSSv3 Calculator
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab

Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in Oxwall, which can be exploited to perform CSRF (Cross-Site Request Forgery) attacks. An attacker might be able to put the website under maintenance and perform XSS attacks against website visitors.

The vulnerability exists due to failure in the "/admin/pages/maintenance" script to properly verify the source of the HTTP request. A remote attacker can trick a logged-in administrator to visit a page with CSRF exploit and put the entire website under maintenance. Additionally, the attacker is able to inject arbitrary HTML and JavaScript code into maintenance message and execute it in browsers of any website visitor. Successful exploitation of this vulnerability may allow an attacker to steal other users’ cookies, spread malware to website visitors, and even obtain full control over vulnerable website.

A simple CSRF exploit below puts the website under maintenance and displays a JS popup with "ImmuniWeb" word to every website visitor:

<form action = "http://[host]/admin/pages/maintenance" method = "POST">
<input type="hidden" name="form_name" value="maintenance">
<input type="hidden" name="maintenance_enable" value="on">
<input type="hidden" name="save" value="Save">
<input type="hidden" name="maintenance_text" value="<script>alert('ImmuniWeb');</script>">
<input value="submit" id="btn" type="submit" />

How to Detect Cross-Site Request Forgery Vulnerabilities
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Update to Oxwall 1.8

[1] High-Tech Bridge Advisory HTB23266 - - Cross-Site Request Forgery on Oxwall.
[2] Oxwall - - Oxwall® is unbelievably flexible and easy to use PHP/MySQL social networking software platform.
[3] Common Vulnerabilities and Exposures (CVE) - - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® - Leveraging the power of machine-learning and genius of human brain to deliver the most advanced web application security and penetration testing.
[6] ImmuniWeb® SSLScan - Test your servers for security and compliance with PCI DSS, HIPAA and NIST.
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