CVE-2020-14209 : Exploit Details and Defense Strategies
Learn about CVE-2020-14209, a vulnerability in Dolibarr before 11.0.5 allowing arbitrary code execution. Find out how to mitigate this security risk and protect your systems.
Dolibarr before 11.0.5 allows low-privilege users to upload files of dangerous types, leading to arbitrary code execution. This occurs because .pht and .phar files can be uploaded. Also, a .htaccess file can be uploaded to reconfigure access control (e.g., to let .noexe files be executed as PHP code to defeat the .noexe protection mechanism).
Understanding CVE-2020-14209
Dolibarr before version 11.0.5 is vulnerable to a security issue that enables low-privilege users to upload malicious files, potentially resulting in arbitrary code execution.
What is CVE-2020-14209?
This CVE refers to a vulnerability in Dolibarr that allows unauthorized users to upload harmful files, leading to the execution of arbitrary code.
The Impact of CVE-2020-14209
The vulnerability can be exploited by attackers to upload malicious files, compromising the security and integrity of the system. This could result in unauthorized code execution and potential system compromise.
Technical Details of CVE-2020-14209
Dive into the technical aspects of this CVE to understand its implications and affected systems.
Vulnerability Description
The vulnerability in Dolibarr before 11.0.5 allows the upload of dangerous file types, such as .pht, .phar, and .htaccess, which can be used to reconfigure access control.
Affected Systems and Versions
- Product: Dolibarr
- Vendor: N/A
- Versions affected: N/A
Exploitation Mechanism
- Low-privilege users can upload .pht and .phar files, enabling arbitrary code execution.
- Uploading a .htaccess file can reconfigure access control, allowing the execution of .noexe files as PHP code.
Mitigation and Prevention
Protect your systems from CVE-2020-14209 by following these mitigation strategies.
Immediate Steps to Take
- Upgrade Dolibarr to version 11.0.5 or later to patch the vulnerability.
- Restrict file upload permissions for low-privilege users.
- Regularly monitor and audit file uploads for suspicious activities.
Long-Term Security Practices
- Implement strict file type restrictions for uploads.
- Conduct regular security training for users to raise awareness of safe file handling practices.
Patching and Updates
- Stay informed about security updates and patches released by Dolibarr.
- Promptly apply patches to ensure your system is protected against known vulnerabilities.