Cve20207796 Zimbra Collaboration Suite 2021 Full Here

Understanding CVE-2020-7796: The SSRF Threat to Zimbra Collaboration Suite

The flaw stems from insufficient input validation within a specific server-side component of the Zimbra application. Specifically, it triggers when the is installed and the Zimlet JSP (JavaServer Pages) functionality is enabled .

The vulnerability stems from this extraction process. In vulnerable versions, the extraction utility fails to validate the file paths specified within the archive. An attacker can craft a malicious archive containing files with specially crafted names like ../../../../path/to/target/file . When the Zimbra server extracts the archive, it follows these path traversal sequences ( ../ ). As a result, instead of placing the file inside the intended temporary extraction directory, it is written to an arbitrary location on the host system's filesystem. This arbitrary file write capability is the core of the vulnerability. cve20207796 zimbra collaboration suite full

The issue originates from a leftover file located at /opt/zimbra/zimlets-deployed/com_zimbra_webex/httpPost.jsp . 🛠️ Remediation Steps

The response lists every admin email hash. She extracts admin@logi-core.local . In vulnerable versions, the extraction utility fails to

Zimbra Collaboration Suite (ZCS) versions before 8.8.15 Patch 7 How to Fix It The primary remediation is to

An attacker sends a crafted request to the vulnerable Zimbra server. As a result, instead of placing the file

She crafts a SOAP request to localhost:7071 asking for an auth token for admin@logi-core.local . The SSRF replies with a valid admin session key.

This last variant shows the devastating effect of combining individual vulnerabilities to create a more powerful exploit chain, often leading to full remote code execution (RCE).