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[R3] Tenable Nessus Malicious Process Detection Temporary Service Binary Modification Local Privilege Escalation



Nessus contains a race condition in the Malicious Process Detection plugin that leads to unauthorized privileges being gained. The issue is due to the plugin creating a binary with a static name in the temporary folder. Once Nessus has started a scan, a low-level user may overwrite this binary, and it will be executed upon reboot of the device. This may allow a local attacker to gain elevated privileges.


Tenable has released an updated version of the affected plugin (59275) to address this issue. Customers will automatically receive the update in the routine daily plugin update.

This page contains information regarding security vulnerabilities that may impact Tenable's products. This may include issues specific to our software, or due to the use of third-party libraries within our software. Tenable strongly encourages users to ensure that they upgrade or apply relevant patches in a timely manner.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]