exploit the possibilities

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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