CVE-2021-41242

 

Published at: - 11-12-2021 12:15

Last modified: - 09-08-2022 03:18

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

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

 

Keywords

NVD

 

CVE-2021-41242

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures