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ATutor Multiple Vulnerabilities

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Release Date:  2010-03-12    Last Update:  2010-07-07    Views:  2,555

Secunia Advisory SA38906

Where:

From remote

Impact:

Cross Site Scripting

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Multiple vulnerabilities have been discovered in ATutor, which can be exploited by malicious users to conduct script insertion attacks and by malicious people to conduct cross-site request forgery attacks.

1) Input passed via "Question" and "Choice" form fields in tools/polls/add.php when creating a poll, via "Type" and "Title" form fields in tools/groups/create_manual.php when creating a group, and via the "Title" form field in assignments/add_assignment.php when creating an assignment is not properly sanitised before being used. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is being viewed.

Successful exploitation requires "Instructor" group credentials.

2) The application allows users to perform certain actions via HTTP requests without performing proper validity checks to verify the requests. This can be exploited to e.g. add a new user if a logged-in administrative user visits a malicious website.

The vulnerabilities are confirmed in version 1.6.4. Other versions may also be affected.


Solution:
Edit the source code to ensure that input is properly sanitised. Do not browse untrusted sites or follow untrusted links while being logged-in to the application.

Provided and/or discovered by:
1) ItSecTeam
2) John Leitch

Original Advisory:
ItSecTeam:
http://www.exploit-db.com/exploits/11685

John Leitch:
http://cross-site-scripting.blogspot.com/2010/07/atutor-20-cross-site-request-forgery.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: ATutor Multiple Vulnerabilities

User Message
greggy RE: ATutor Multiple Script Insertion Vulnerabilities
Member 15th Mar, 2010 16:33
Score: 2
Posts: 3
User Since: 15th Mar 2010
System Score: N/A
Location: CA
Last edited on 15th Mar, 2010 16:33
This is a trivial issue. Instructors are granted the freedom to used
HTML and scripting to provide added flexibility. Only the instructor of
a given course would be able to exploit these, in which case they'd be
hacking their own content.

Will patch these in a future version, if the patches do not overly restrict the freedom on instructors to develop content.
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