What is the Vulnerability?Attackers are actively exploiting CVE-2024-45519, a critical Zimbra vulnerability that allows attackers to execute arbitrary commands on vulnerable systems. CVE-2024-45519 is a vulnerability in the postjournal service used for recording email communications. This OS command injection flaw can be exploited without authentication and successful exploitation can lead to unauthorized access, privilege escalation, and potential compromise of the affected system’s integrity and confidentiality.Zimbra Collaboration (by Synacor) is a popular cloud-based collaboration software and email platform. The remote code execution vulnerability (CVE-2024-45519) in this software was disclosed on September 27, along with a proof of concept (PoC) exploit.What is the recommended Mitigation?Zimbra has released a patch for CVE-2024-45519. Organizations that haven’t implemented the latest patch are advised to do so immediately. https://blog.zimbra.com/2024/10/zimbra-cve-2024-45519-vulnerability-stay-secure-by-updating/ What FortiGuard Coverage is available?FortiGuard recommends users to apply the fix provided by the vendor. The FortiGuard Incident Response team can be engaged to help with any suspected compromise.The FortiGuard Labs team is further investigating to provide protections and will update this Threat Signal Report with more information once it becomes available.

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