This information is provided as part of the Lynis community project. It is related to Lynis control STRG-1840 and should be considered as-is and without guarantees. Any advice and commands should be tested before implementing them in production environments.
How to solve
Nowadays, most systems have multiple USB ports available. Linux supports USB as well, including a wide variety of hardware devices which can be connected. One of the biggest threats for companies is data theft via USB sticks. They are small while still having a great capacity of data to store.
When a system does not need any USB devices to be plugged in, simply disable USB support from the BIOS of the system. Otherwise determine what kind of devices should be connected. If this is limited to keyboards and mouses, restrict other types of USB devices, like storage devices. On Linux this can be done by blacklisting drivers.
- Blacklist kernel modules (How to block kernel modules from being loaded)
Need more details?
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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.
Do you need to collect data from multiple systems or compliance reporting? Lynis Enterprise uses Lynis to collect the data and make your work easier.
Benefits: automate security audits, detailed reporting, compliance testing.
- Centralized management
- Improvement plan with priorities
- Predefined policies
- Integration (API)
- Improvement snippets for tools like Ansible, Chef, Cfengine, Puppet, and SaltStack