CVE-2021-31933
First published: Fri Apr 30 2021(Updated: )
A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Chamilo Chamilo | <=1.11.14 |
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Reference Links
- http://packetstormsecurity.com/files/162572/Chamilo-LMS-1.11.14-Remote-Code-Execution.html
- https://github.com/chamilo/chamilo-lms/commit/229302139e8d23bf6862183cf219b967f6e2fbc1
- https://github.com/chamilo/chamilo-lms/commit/f65d065061a77bb2e84f73217079ce3998cf3453
- https://support.chamilo.org/projects/1/wiki/Security_issues#Issue-48-2021-04-17-Critical-impact-high-risk-Remote-Code-Execution
Frequently Asked Questions
What is CVE-2021-31933?
CVE-2021-31933 is a remote code execution vulnerability in Chamilo through 1.11.14.
How does CVE-2021-31933 occur?
CVE-2021-31933 occurs due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames.
What is the severity level of CVE-2021-31933?
CVE-2021-31933 has a severity level of 7.2 (high).
Which software versions are affected by CVE-2021-31933?
Chamilo versions up to 1.11.14 are affected by CVE-2021-31933.
How can I fix CVE-2021-31933?
To fix CVE-2021-31933, it is recommended to update Chamilo to a version higher than 1.11.14.
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