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CVE-2020-14321

Status Candidate

Overview

This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Related Files

Moodle Teacher Enrollment Privilege Escalation / Remote Code Execution
Posted Oct 12, 2021
Authored by h00die, lanz, HoangKien1020 | Site metasploit.com

Moodle versions 3.9, 3.8 to 3.8.3, 3.7 to 3.7.6, 3.5 to 3.5.12, and earlier unsupported versions allow for a teacher to exploit chain to remote code execution. A bug in the privileges system allows a teacher to add themselves as a manager to their own class. They can then add any other users, and thus look to add someone with manager privileges on the system (not just the class). After adding a system manager, a loginas feature is used to access their account. Next the system is reconfigured to allow for all users to install an addon/plugin. Then a malicious theme is uploaded and creates an RCE. If all of that is a success, we revert permissions for managers to system default and remove our malicious theme. Manual cleanup to remove students from the class is required. This Metasploit module was tested against Moodle version 3.9.

tags | exploit, remote, code execution
advisories | CVE-2020-14321
MD5 | ebc3a909ac2dea6048c783034195cd70
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