AlmaLinux OS 9 library directories must have mode 755 or less permissive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-269174	ALMA-09-010800	SV-269174r1050056_rule		Medium

Description

If AlmaLinux OS 9 allowed 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 AlmaLinux OS 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.

STIG	Date
CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide	2025-05-22

Details

Check Text (C-73205r1049254_chk)

Verify the systemwide shared library directories have mode "755" or less permissive with the following command:

$ find -L /lib /lib64 /usr/lib /usr/lib64 -perm /022 -type d -exec ls -l {} \;

If any systemwide shared library file is found to be group-writable or world-writable, this is a finding.

Fix Text (F-73106r1049255_fix)

Configure the systemwide shared library directories (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access.

Run the following command, replacing "[DIRECTORY]" with any library directory with a mode more permissive than 755.

$ chmod 755 [DIRECTORY]