CVE-2021-39181 Information

Description

OpenOlat is a web-based learning management system (LMS). Prior to version 15.3.18 15.5.3 and 16.0.0 using a prepared import XML file (e.g. a course) any class on the Java classpath can be instantiated including spring AOP bean factories. This can be used to execute code arbitrary code by the attacker. The attack requires an OpenOlat user account with the authoring role. It can not be exploited by unregistered users. The problem is fixed in versions 15.3.18 15.5.3 and 16.0.0. There are no known workarounds aside from upgrading.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/OpenOLAT/OpenOLAT/commit/3f219ac457afde82e3be57bc614352ab92c05684 https://jira.openolat.org/browse/OO-5548 https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-596v-3gwh-2m9w

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8