FINT-4350 - Install a file integrity tool

(File Integrity)

This information is provided as part of the Lynis community project. It is related to Lynis control FINT-4350 and should be considered as-is and without guarantees. Any advice and commands should be tested before implementing them in production environments.

Description

To monitor for unauthorized changes, a file integrity tool can help with the detection of such event. Each time the contents or the properties of a file change, it will have a different checksum. With regular checks of the related integrity database, discovering changes becomes easy.Install a tool like AIDE, Samhain or Tripwire to monitor important system and data files. Additionally configure the tool to alert system or security personnel on events.

How to solve

Install a tool like AIDE to help monitoring file changes. Good monitoring will ensure that both authorized changes are properly documented, and unauthorized changes are detected early.

Tip: when possible, link events to a (security) monitoring system, or your ITIL problem management. Especially unauthorized changes need a root cause analysis, or trigger incident response.

Need more details?

Consider an upgrade to Lynis Enterprise to receive more guidance. The Enterprise version helps to you with daily health checks of your environment, learn in-depth system hardening, and resources to protect your systems better.

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About

Lynis is a technical security auditing tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. Typical usage include system hardening, compliance testing, and vulnerability scanning. The project has an active community, including development via GitHub.

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