CVE-2021-44664 : Exploit Details and Defense Strategies
Learn about CVE-2021-44664, an Authenticated Remote Code Execution vulnerability in Xerte through 3.9. Understand the impact, affected versions, exploitation, and mitigation steps.
An Authenticated Remote Code Execution (RCE) vulnerability exists in Xerte through 3.9 in website_code/php/import/fileupload.php by uploading a maliciously crafted PHP file disguised as a language file to bypass upload filters.
Understanding CVE-2021-44664
What is CVE-2021-44664?
The vulnerability allows attackers to upload a PHP file through the project interface, bypassing upload filters, and manipulate the file's destination via path traversal.
The Impact of CVE-2021-44664
The exploit grants attackers the ability to execute remote code on the affected system, potentially leading to unauthorized access and data breaches.
Technical Details of CVE-2021-44664
Vulnerability Description
- Authenticated RCE vulnerability in Xerte through 3.9 in website_code/php/import/fileupload.php
- Malicious PHP file upload disguised as a language file
- Path traversal in the 'mediapath' variable
Affected Systems and Versions
- Xerte versions through 3.9
Exploitation Mechanism
- Uploading a PHP file through the project interface
- Bypassing upload filters
- Abusing path traversal in the 'mediapath' variable
Mitigation and Prevention
Immediate Steps to Take
- Update Xerte to a patched version
- Restrict access to the affected fileupload.php
- Monitor web traffic for suspicious file uploads
Long-Term Security Practices
- Regularly review and update upload file filters
- Implement access controls and proper input validation
Patching and Updates
- Apply the latest security patches from Xerte to address the RCE vulnerability