CVE-2020-26033 : Security Advisory and Response

An issue was discovered in Zammad before 3.4.1. The Tag and Link REST API endpoints lack a CSRF token check.

Understanding CVE-2020-26033

This CVE identifies a security vulnerability in Zammad that could be exploited due to missing CSRF token checks in certain API endpoints.

What is CVE-2020-26033?

The CVE-2020-26033 vulnerability pertains to the absence of CSRF token verification in the Tag and Link REST API endpoints in Zammad versions prior to 3.4.1.

The Impact of CVE-2020-26033

The vulnerability could allow malicious actors to perform unauthorized actions through the affected API endpoints, potentially leading to data manipulation or unauthorized access.

Technical Details of CVE-2020-26033

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue in Zammad before version 3.4.1 arises from the lack of CSRF token validation in the Tag and Link REST API endpoints, enabling potential CSRF attacks.

Affected Systems and Versions

Affected Product: Zammad
Affected Versions: All versions before 3.4.1

Exploitation Mechanism

Attackers can exploit this vulnerability by sending crafted requests to the Tag and Link REST API endpoints without the need for a valid CSRF token, potentially leading to unauthorized actions.

Mitigation and Prevention

Protecting systems from CVE-2020-26033 requires immediate actions and long-term security measures.

Immediate Steps to Take

Upgrade Zammad to version 3.4.1 or later to mitigate the vulnerability.
Implement additional security controls to validate and enforce CSRF tokens in API requests.

Long-Term Security Practices

Regularly update and patch Zammad to ensure the latest security fixes are in place.
Conduct security assessments and audits to identify and address any potential vulnerabilities.

Patching and Updates

Apply patches and updates provided by Zammad promptly to address security vulnerabilities and enhance system security.