CVE-2021-41242 Information

Description

OpenOlat is a web-basedlearning management system. A path traversal vulnerability exists in OpenOlat prior to versions 15.5.12 and 16.0.5. By providing a filename that contains a relative path as a parameter in some REST methods it is possible to create directory structures and write files anywhere on the target system. The attack could be used to write files anywhere in the web root folder or outside depending on the configuration of the system and the properly configured permission of the application server user. The attack requires an OpenOlat user account an enabled REST API and the rights on a business object to call the vulnerable REST calls. The problem is fixed in version 15.5.12 and 16.0.5. There is a workaround available. The vulnerability requires the REST module to be enabled. Disabling the REST module or limiting the REST module via some firewall or web-server access rules to be accessed only be trusted systems will mitigate the risk.

CVSS Vector

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

Reference

https://github.com/OpenOLAT/OpenOLAT/commit/336d5ce80681be61a0bbf4f73d2af5d1ff67e93a https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-62hv-rfp4-hmrm https://jira.openolat.org/browse/OO-5819 https://github.com/OpenOLAT/OpenOLAT/commit/c450df7d7ffe6afde39ebca6da9136f1caa16ec4

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1