CVE-2020-13382: openSIS 7.4 Incorrect Access Control ≈ Packet Storm

-------------------------------------------------------openSIS <= 7.4 Incorrect Access Control Vulnerabilities-------------------------------------------------------[-] Software Link:https://opensis.com/[-] Affected Versions:Version 7.4 and prior versions.[-] Vulnerabilities Description:The application prevents unauthenticated access to its functionalities by includingthe 'RedirectIncludes.php', 'RedirectModules.php', and 'RedirectRootInc.php' scripts,which implement the access control logic by using the following code:if(!$_SESSION['STAFF_ID'] && !$_SESSION['STUDENT_ID'] && strpos($_SERVER['PHP_SELF'],'index.php')===false){     header('Location: ../../../index.php');     exit;}This can be easily bypassed by appending /index.php at the end of the URL, and canbe exploited by unauthenticated attackers to potentially access any applicationfunctionality which should require the user to be authenticated.[-] Solution:No official solution is currently available.[-] Disclosure Timeline:[04/11/2019] - Vendor notified[04/11/2019] - Vendor acknowledgement[10/01/2020] - Vendor contacted again asking for updates[15/01/2020] - Vendor replied they would need a few examples[20/01/2020] - Told the vendor they could use the PoC I sent them in November[05/02/2020] - Vendor asked for a video recording to demonstrate the vulnerabilities[06/02/2020] - Proof of Concept video sent to the vendor[03/03/2020] - Vendor contacted again asking for updates[04/03/2020] - Vendor replied "we just have to wait a little longer"[25/04/2020] - Version 7.4 released, vulnerabilities still not fixed[22/05/2020] - CVE number assigned[30/06/2020] - Public disclosure[-] CVE Reference:The Common Vulnerabilities and Exposures project (cve.mitre.org)has assigned the name CVE-2020-13382 to these vulnerabilities.[-] Credits:Vulnerabilities discovered by Egidio Romano.[-] Original Advisory:http://karmainsecurity.com/KIS-2020-06