Title

The Ubuntu operating system library directories must be group-owned by root. (Cat II impact)

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 must be allowed to obtain access to information system components for purposes of initiating changes, including upgrades and modifications.

Check Content

Verify the system-wide library directories "/lib", "/lib64" and "/usr/lib" are group-owned by root. Check that the system-wide library directories are group-owned by root with the following command: # sudo find /lib /usr/lib /lib64 ! -group root -type d -exec stat -c "%n %G" '{}' \; If any system wide shared library directory is returned, this is a finding.

Fix Text

Configure the system library directories to be protected from unauthorized access. Run the following command: # sudo find /lib /usr/lib /lib64 ! -group root -type d -exec chgrp root '{}' \;

Additional Identifiers

Rule ID: SV-219203r610963_rule

Vulnerability ID: V-219203

Group Title: SRG-OS-000259-GPOS-00100

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.