CVE-2020-8866 Explained : Impact and Mitigation
CVE-2020-8866 allows remote attackers to create arbitrary files on Horde Groupware Webmail Edition 5.2.22. Learn about the impact, affected systems, and mitigation steps.
This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22. Authentication is required to exploit this vulnerability. The specific flaw exists within add.php. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the www-data user.
Understanding CVE-2020-8866
This CVE affects Horde Groupware Webmail Edition version 5.2.22.
What is CVE-2020-8866?
CVE-2020-8866 is a vulnerability that allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22.
The Impact of CVE-2020-8866
The impact of this vulnerability is rated as medium severity with a CVSS base score of 4.3. It requires low privileges and user interaction is not needed. However, exploitation can lead to the execution of arbitrary code.
Technical Details of CVE-2020-8866
This section provides more technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows remote attackers to upload arbitrary files due to improper validation of user-supplied data in add.php.
Affected Systems and Versions
- Product: Groupware Webmail Edition
- Vendor: Horde
- Version: 5.2.22
Exploitation Mechanism
The lack of proper validation of user-supplied data in add.php allows attackers to upload arbitrary files, potentially leading to code execution.
Mitigation and Prevention
Protecting systems from CVE-2020-8866 is crucial to maintaining security.
Immediate Steps to Take
- Apply the security update provided by Horde promptly.
- Ensure proper authentication mechanisms are in place to prevent unauthorized access.
Long-Term Security Practices
- Regularly monitor and update the software to patch known vulnerabilities.
- Conduct security audits to identify and address any potential weaknesses.
Patching and Updates
- Stay informed about security updates and patches released by Horde.
- Implement a robust patch management process to apply updates promptly.