CVE-2020-7796 Explained : Impact and Mitigation

Zimbra Collaboration Suite (ZCS) before 8.8.15 Patch 7 allows SSRF when WebEx zimlet is installed and zimlet JSP is enabled.

Understanding CVE-2020-7796

Zimbra Collaboration Suite (ZCS) is vulnerable to SSRF when specific conditions are met.

What is CVE-2020-7796?

CVE-2020-7796 is a vulnerability in Zimbra Collaboration Suite (ZCS) that enables Server-Side Request Forgery (SSRF) when the WebEx zimlet is installed and zimlet JSP is enabled.

The Impact of CVE-2020-7796

This vulnerability could allow an attacker to send crafted requests from the server, potentially leading to unauthorized access to internal systems or services.

Technical Details of CVE-2020-7796

ZCS before version 8.8.15 Patch 7 is affected by this vulnerability.

Vulnerability Description

The vulnerability allows SSRF attacks when specific zimlet configurations are in place.

Affected Systems and Versions

Product: Zimbra Collaboration Suite (ZCS)
Versions: Before 8.8.15 Patch 7

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the zimlet configurations to send malicious requests.

Mitigation and Prevention

Immediate action is necessary to secure systems against CVE-2020-7796.

Immediate Steps to Take

Update ZCS to version 8.8.15 Patch 7 or later.
Disable the WebEx zimlet if not essential for operations.

Long-Term Security Practices

Regularly monitor and audit zimlet configurations for any unauthorized changes.
Educate users on the risks of enabling untrusted zimlets.

Patching and Updates

Apply patches and updates provided by Zimbra to address this vulnerability.