Library files must be owned by root.

From Canonical Ubuntu 16.04 Security Technical Implementation Guide

Associated with: CCI-001499

SV-90287r2_rule Library files must be owned by root.

Vulnerability discussion

If the Ubuntu operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process.This requirement applies to Ubuntu operating systems with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs which execute with escalated privileges. Only qualified and authorized individuals shall be allowed to obtain access to information system components for purposes of initiating changes, including upgrades and modifications.

Check content

Verify the system-wide shared library files are owned by "root". Check that the system-wide shared library files are owned by "root" with the following command: # sudo find /lib /usr/lib /lib64 ! -user root | xargs ls -la If any system wide shared library file is returned, this is a finding.

Fix text

Configure the system-wide shared library files (/lib, /usr/lib, /lib64) to be protected from unauthorized access. Run the following command, replacing "[FILE]" with any library file not owned by "root". # sudo chown root [FILE]

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