CVE-2021-42091 Explained : Impact and Mitigation
Discover the impact of CVE-2021-42091 found in Zammad before 4.1.1, enabling SSRF attacks through GitHub or GitLab integrations. Learn about exploitation mechanisms and mitigation steps.
An issue was discovered in Zammad before 4.1.1. SSRF can occur via GitHub or GitLab integration.
Understanding CVE-2021-42091
Zammad before version 4.1.1 is vulnerable to SSRF attacks through GitHub or GitLab integration.
What is CVE-2021-42091?
CVE-2021-42091 is a security vulnerability found in Zammad, allowing Server-Side Request Forgery (SSRF) attacks when using GitHub or GitLab integrations.
The Impact of CVE-2021-42091
This vulnerability could be exploited by an attacker to perform SSRF attacks, potentially leading to unauthorized access to internal resources or sensitive data.
Technical Details of CVE-2021-42091
Zammad before version 4.1.1 is affected by SSRF vulnerability through GitHub or GitLab connections.
Vulnerability Description
SSRF vulnerability allows attackers to make requests on behalf of the server, potentially disclosing sensitive information or accessing internal resources.
Affected Systems and Versions
- Product: Zammad
- Vendor: N/A
- Affected Version: N/A
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating GitHub or GitLab integration to make requests to internal systems.
Mitigation and Prevention
Immediate steps to take:
- Update Zammad to version 4.1.1 or later
- Restrict network access to Zammad and associated integrations
Long-Term Security Practices
- Regularly monitor and audit server logs for unusual activities
- Implement strong access controls and authentication mechanisms
Patching and Updates
Update Zammad to version 4.1.1 to patch the SSRF vulnerability.