CVE-2020-26032 : Vulnerability Insights and Analysis

An SSRF issue in Zammad before 3.4.1 allows attackers to request any URL via a GET request, potentially leading to information disclosure from intranet systems.

Understanding CVE-2020-26032

What is CVE-2020-26032?

This CVE identifies a Server-Side Request Forgery (SSRF) vulnerability in Zammad versions prior to 3.4.1, specifically affecting the SMS configuration interface for Massenversand.

The Impact of CVE-2020-26032

The vulnerability enables attackers to manipulate the server to make requests to arbitrary URLs, potentially exposing sensitive information from internal systems.

Technical Details of CVE-2020-26032

Vulnerability Description

The SSRF flaw in Zammad allows attackers to exploit the SMS configuration interface to send unauthorized requests to the server's network interface.

Affected Systems and Versions

Product: Zammad
Versions affected: Before 3.4.1

Exploitation Mechanism

Attackers can abuse the SMS configuration interface to trigger GET requests to any URL accessible from the server, leading to potential data leakage.

Mitigation and Prevention

Immediate Steps to Take

Update Zammad to version 3.4.1 or later to mitigate the SSRF vulnerability.
Restrict network access to the server to prevent unauthorized requests.

Long-Term Security Practices

Regularly monitor and audit server logs for suspicious activities.
Implement strict input validation to prevent SSRF attacks.

Patching and Updates

Apply security patches promptly and keep software up to date to address known vulnerabilities.