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CVE-2020-7796: Zimbra Collaboration Suite Vulnerability

• This can be achieved by modifying the Amavis configuration, though it may

Step 1: Reconnaissance

The attacker first checks if the target Zimbra server is vulnerable by sending a benign request to the proxy endpoint and examining the response headers or error messages. cve20207796 zimbra collaboration suite full

The vulnerability impacts Zimbra Collaboration Suite versions prior to 8.8.15 Patch 7. Remediation and Mitigation CVE-2020-7796: Zimbra Collaboration Suite Vulnerability

The Missing Authentication Check

The critical oversight: The servlet endpoint that allows proxying to internal services (like the mailboxd admin port on localhost) did not enforce authentication. Even worse, certain endpoints of the servlet allowed execution of system commands via the Command or Extension functionality. This can be achieved by modifying the Amavis

Impact: A remote, unauthenticated attacker can send specially crafted HTTP requests to the server. This allows them to:

Sensitive information from internal metadata services or local configuration files may be retrieved. Remote Code Execution (RCE): In some configurations, SSRF can be leveraged to gain full control over the affected system 3. Affected Versions Zimbra Collaboration Suite versions prior to 8.8.15 Patch 7 4. Risk Assessment Authentication: Not required (Unauthenticated). Exploitation Status:

Zimbra Collaboration Suite is a comprehensive email and collaboration platform designed for businesses and organizations. It offers a range of features, including email, calendar, contacts, and file sharing, making it a popular choice for enterprises seeking to streamline their communication and collaboration needs. The suite is available in both open-source and commercial editions, with the open-source version being widely used by organizations worldwide.