CVE-2021-41242 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-41242, a path traversal vulnerability in OpenOlat's versions < 15.5.12 and >= 16.0.0. Learn about the exploitation risks and mitigation steps to secure your system.
OpenOlat, a web-based learning management system, is affected by a path traversal vulnerability. This CVE highlights the potential risk of allowing users to write files anywhere on the target system, which could lead to severe consequences if exploited. Learn more about the impact, technical details, and mitigation steps related to CVE-2021-41242.
Understanding CVE-2021-41242
OpenOlat is susceptible to a path traversal vulnerability that could enable attackers to upload files to arbitrary locations.
What is CVE-2021-41242?
OpenOlat versions prior to 15.5.12 and 16.0.5 contain a path traversal flaw. By manipulating filenames in specific REST requests, an attacker could potentially create directory structures and write files on the target system.
The Impact of CVE-2021-41242
The vulnerability poses a high integrity impact, allowing attackers to write files within the web root folder or outside, depending on system configurations and user permissions. An attacker needs an OpenOlat user account, enabled REST API, and specific rights to exploit the vulnerability.
Technical Details of CVE-2021-41242
OpenOlat's vulnerability comes with significant technical details.
Vulnerability Description
The path traversal issue enables attackers to create directory structures and write files anywhere on the system.
Affected Systems and Versions
- Product: OpenOLAT
- Versions Affected: < 15.5.12, >= 16.0.0, < 16.0.5
Exploitation Mechanism
Attackers leverage REST methods by manipulating filenames to write files on the system, exploiting weak configurations and permissions.
Mitigation and Prevention
Protecting against CVE-2021-41242 is crucial.
Immediate Steps to Take
- Update OpenOlat to version 15.5.12 or 16.0.5, where the issue is resolved.
- Consider implementing the workaround provided.
Long-Term Security Practices
- Disable the REST module if not essential.
- Limit REST access through firewall or web-server rules to trusted systems.
Patching and Updates
Regularly apply patches and updates to OpenOlat to address vulnerabilities and enhance security.