what you don't know can hurt you

ATutor 2.2 Cross Site Scripting

ATutor 2.2 Cross Site Scripting
Posted Nov 4, 2015
Authored by EgiX

ATutor versions 2.2 and below suffer from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2015-7711
MD5 | 7a796af56f53c00102bcd30e7e37145a

ATutor 2.2 Cross Site Scripting

Change Mirror Download
--------------------------------------------------------------------------
ATutor <= 2.2 (popuphelp.php) Reflected Cross-Site Scripting Vulnerability
--------------------------------------------------------------------------


[-] Software Link:

http://www.atutor.ca/


[-] Affected Versions:

Version 2.2 and prior versions.


[-] Vulnerability Description:

The vulnerable code is located in the /popuphelp.php script:

26. if ($_GET['h']) {
27. $h = $_GET['h'];
28.
29. if (is_string($_GET['h'])) { // just a AT_HELP code with no prefix
30. $msg->printHelps($h);

User input passed through the "h" GET parameter is not properly sanitized before
being passed to the "Message::printHelps()" method at line 30. This can be
exploited to carry out reflected Cross-Site Scripting (XSS) attacks.


[-] Solution:

No official solution is currently available.


[-] Disclosure Timeline:

[06/10/2014] - Vendor notified
[09/10/2014] - Vendor response stating this issue has been added to the bug tracker and it is relatively minor
[11/11/2014] - Vendor replied asking for fix suggestions
[11/11/2014] - Fix suggestions have been provided to the vendor
[30/09/2015] - CVE number requested
[05/10/2015] - CVE number assigned
[06/10/2015] - After one year still no official solution available
[04/11/2015] - Public disclosure


[-] CVE Reference:

The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CVE-2015-7711 to this vulnerability.


[-] Credits:

Vulnerability discovered by Egidio Romano.


[-] Original Advisory:

http://karmainsecurity.com/KIS-2015-07


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