CVE-2020-29158 : Security Advisory and Response

An issue was discovered in Zammad before 3.5.1. An Agent with Customer permissions in a Group can bypass intended access control on internal Articles via the Ticket detail view.

Understanding CVE-2020-29158

This CVE identifies a vulnerability in Zammad that allows unauthorized access to internal Articles.

What is CVE-2020-29158?

The vulnerability in Zammad before version 3.5.1 enables an Agent with Customer permissions to circumvent access controls on internal Articles through the Ticket detail view.

The Impact of CVE-2020-29158

The vulnerability could lead to unauthorized access to sensitive internal Articles, potentially compromising confidentiality and integrity.

Technical Details of CVE-2020-29158

This section provides technical details of the vulnerability.

Vulnerability Description

The issue in Zammad before 3.5.1 allows Agents with Customer permissions to bypass access controls on internal Articles via the Ticket detail view.

Affected Systems and Versions

Product: Zammad
Vendor: Zammad
Versions affected: All versions before 3.5.1

Exploitation Mechanism

Unauthorized Agents with Customer permissions can exploit this vulnerability through the Ticket detail view to access internal Articles.

Mitigation and Prevention

Protect your systems from CVE-2020-29158 with the following steps:

Immediate Steps to Take

Update Zammad to version 3.5.1 or later to mitigate the vulnerability.
Review and adjust permissions for Agents to prevent unauthorized access.

Long-Term Security Practices

Regularly review and update access controls and permissions within Zammad.
Educate users on the importance of following security protocols to prevent unauthorized access.

Patching and Updates

Stay informed about security updates and patches released by Zammad.
Promptly apply patches to ensure your system is protected against known vulnerabilities.