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

2015.11.05
Credit: Egidio Romano
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

-------------------------------------------------------------------------- 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

References:

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


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