CVE-2020-8865 : What You Need to Know

This vulnerability allows remote attackers to execute local PHP files on affected installations of Horde Groupware Webmail Edition 5.2.22. Authentication is required to exploit this vulnerability. The specific flaw exists within edit.php. When parsing the params[template] parameter, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the www-data user. Was ZDI-CAN-10469.

Understanding CVE-2020-8865

This CVE affects Horde Groupware Webmail Edition version 5.2.22.

What is CVE-2020-8865?

CVE-2020-8865 is a vulnerability that allows remote attackers to execute local PHP files on affected installations of Horde Groupware Webmail Edition 5.2.22.

The Impact of CVE-2020-8865

The vulnerability has a CVSS base score of 6.3, with a medium severity rating. It requires low privileges and user interaction, with low impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2020-8865

Vulnerability Description

The flaw in edit.php of Horde Groupware Webmail Edition 5.2.22 allows remote attackers to execute local PHP files by manipulating the params[template] parameter.

Affected Systems and Versions

Product: Groupware Webmail Edition
Vendor: Horde
Version: 5.2.22

Exploitation Mechanism

Attackers can exploit this vulnerability by providing a malicious path in the params[template] parameter, leading to the execution of unauthorized PHP files.

Mitigation and Prevention

Immediate Steps to Take

Apply the security update provided by the vendor.
Ensure proper authentication mechanisms are in place.

Long-Term Security Practices

Regularly monitor and update the software to patch known vulnerabilities.
Conduct security audits to identify and address potential weaknesses.

Patching and Updates

Stay informed about security advisories and apply patches promptly to prevent exploitation.