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QCubed 3.1.1 PHP Object Injection

CVE Category Price Severity
CVE-2020-24914 CWE-502 $500 High
Author Risk Exploitation Type Date
Unknown Critical Remote 2021-03-13
CPE
cpe:cpe:/a:qcubed_project:qcubed:3.1.1
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H 0.0448 0.61544

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021030065

Below is a copy:

QCubed 3.1.1 PHP Object Injection
QCubed PHP Object Injection
===========================

| Identifier: | AIT-SA-20210215-01 |
| Target: | QCubed Framework |
| Vendor: | QCubed |
| Version: | all versions including 3.1.1 |
| CVE: | CVE-2020-24914 |
| Accessibility: | Remote |
| Severity: | Critical |
| Author: | Wolfgang Hotwagner (AIT Austrian Institute of Technology) |

SUMMARY
=======
QCubed is a PHP Model-View-Controller Rappid Application Development framework. (https://github.com/qcubed/qcubed)

VULNERABILITY DESCRIPTION
=========================
A PHP object injection bug in profile.php in qcubed (all versions including 3.1.1) unserializes the untrusted data of the POST-variable "strProfileData" and allows an unauthenticated attacker to execute code via a crafted POST request.

qcubed/assets/php/profile.php:
<?php 
 require_once('./qcubed.inc.php');

 //Exit gracefully if called directly or profiling data is missing.
 if ( !isset($_POST['intDatabaseIndex']) && !isset($_POST['strProfileData']) && !isset($_POST['strReferrer']) )
  exit('Nothing to profile. No Database Profiling data recived.');

 if ( !isset($_POST['intDatabaseIndex']) || !isset($_POST['strProfileData']) || !isset($_POST['strReferrer']) )
  throw new Exception('Database Profiling data appears to have been corrupted.');

 $intDatabaseIndex = intval($_POST['intDatabaseIndex']);
 $strReferrer = QApplication::HtmlEntities($_POST['strReferrer']);

 $objProfileArray = unserialize(base64_decode($_POST['strProfileData'])); //<-VULNERABLE CODE
 $objProfileArray = QType::Cast($objProfileArray, QType::ArrayType);


VULNERABLE VERSIONS
===================
All versions including 3.1.1 are affected.


TESTED VERSIONS
===============
QCubed 3.1.1

IMPACT
======
An unauthenticated attacker could execute code remotely.

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 |

ADVISORY URL
============

[https://www.ait.ac.at/ait-sa-20210215-01-unauthenticated-remote-code-execution-qcubed](https://www.ait.ac.at/ait-sa-20210215-01-unauthenticated-remote-code-execution-qcubed) 


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