CVE-2021-40694 : Exploit Details and Defense Strategies
Learn about CVE-2021-40694, a Moodle vulnerability allowing site administrators to access files accessible to the HTTP server system account. Find mitigation steps and prevention measures here.
This CVE record involves an insufficient escaping of the LaTeX preamble in Moodle versions 3.11 to 3.11.2, 3.10 to 3.10.6, 3.9 to 3.9.9, and earlier unsupported versions, allowing site administrators to read files available to the HTTP server system account.
Understanding CVE-2021-40694
This section will cover an overview of the CVE-2021-40694 vulnerability.
What is CVE-2021-40694?
The vulnerability in Moodle platforms enables site administrators to access files accessible to the HTTP server system account due to insufficient escaping of the LaTeX preamble.
The Impact of CVE-2021-40694
The insufficient escaping of the LaTeX preamble in Moodle versions poses the following risks:
- Potential unauthorized access to sensitive files by site administrators.
Technical Details of CVE-2021-40694
This section will delve into the technical aspects of the CVE-2021-40694 vulnerability.
Vulnerability Description
The vulnerability involves insufficient escaping of the LaTeX preamble in Moodle, leading to the exposure of files accessible to the HTTP server system account.
Affected Systems and Versions
Moodle versions 3.11 to 3.11.2, 3.10 to 3.10.6, 3.9 to 3.9.9, and earlier unsupported versions are affected by this vulnerability.
Exploitation Mechanism
The exploitation of this vulnerability allows site administrators to read files available to the HTTP server system account through Moodle platforms.
Mitigation and Prevention
This section will provide guidance on mitigating the CVE-2021-40694 vulnerability.
Immediate Steps to Take
To address the CVE-2021-40694 vulnerability, consider the following immediate actions:
- Apply patches provided by Moodle to fix the vulnerability.
- Monitor system files and logs for any unauthorized access.
Long-Term Security Practices
Implement the following long-term security practices to enhance system resilience:
- Regularly update Moodle to the latest supported version.
- Conduct security assessments and audits periodically.
Patching and Updates
Stay informed about security patches and updates released by Moodle to address vulnerabilities like CVE-2021-40694.