CVE-2021-35208 : Security Advisory and Response
Learn about CVE-2021-35208, a security vulnerability in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23 that allows arbitrary markup injection. Find out the impact, affected systems, and mitigation steps.
A security vulnerability, identified as CVE-2021-35208, was found in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23. This vulnerability allows attackers to inject arbitrary markup into the document by placing HTML containing executable JavaScript inside element attributes in the Calendar Invite component.
Understanding CVE-2021-35208
This section will delve into the details of the CVE-2021-35208 vulnerability, its impact, technical aspects, and mitigation strategies.
What is CVE-2021-35208?
The CVE-2021-35208 vulnerability exists in Zimbra Collaboration Suite 8.8.x before 8.8.15 Patch 23, allowing attackers to insert malicious markup by leveraging a specific component of the software.
The Impact of CVE-2021-35208
The exploitation of this vulnerability could lead to arbitrary markup injection in the Zimbra web interface, potentially compromising the security and integrity of user data.
Technical Details of CVE-2021-35208
Let's explore the technical aspects associated with CVE-2021-35208 to understand the vulnerability better.
Vulnerability Description
The vulnerability resides in ZmMailMsgView.js within the Calendar Invite component, enabling attackers to embed executable JavaScript code within element attributes.
Affected Systems and Versions
Zimbra Collaboration Suite versions 8.8.x before 8.8.15 Patch 23 are impacted by this security flaw.
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting HTML code containing executable JavaScript into element attributes, which gets executed in the context of the application.
Mitigation and Prevention
Protecting systems from CVE-2021-35208 requires immediate actions and long-term security practices to mitigate risks effectively.
Immediate Steps to Take
Users and system administrators should update Zimbra Collaboration Suite to version 8.8.15 Patch 23 or later to address this vulnerability.
Long-Term Security Practices
Regularly monitor security advisories, apply patches promptly, and educate users about safe email practices to enhance overall cybersecurity.
Patching and Updates
Stay informed about the latest security updates and patches released by Zimbra to ensure ongoing protection against known vulnerabilities.