Oracle Linux 5 Security Technical Implementation Guide

The Oracle Linux 5 Security Technical Implementation Guide (V2 R1) has 571 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V2 · R1

CurrentPublished Fri Jan 22 2021

All files and directories contained in user home directories must be group-owned by a group of which the home directorys owner is a member.

Oracle Linux 5 Security Technical Implementation Guide

Assessment Title

Rule Text

All files and directories contained in user home directories must be group-owned by a group of which the home directorys owner is a member.

Description

Discussion Text

If a user's files are group-owned by a group of which the user is not a member, unintended users may be able to access them.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-218313

Rule

SV-218313r603259_rule

Severity

medium

Rule Version

GEN001550

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Check the contents of user home directories for files group-owned by a group of which the home directory's owner is not a member.
1. List the user accounts.
# cut -d : -f 1 /etc/passwd
2. For each user account, get a list of GIDs for files in the user's home directory.
# find ~username -printf %G\\n | sort | uniq
3. Obtain the list of GIDs where the user is a member.
# id -G username
4. Check the GID lists. If there are GIDs in the file list not present in the user list, this is a finding.

Implementation Procedure

Fix Text

Change the group of a file not group-owned by a group of which the home directory's owner is a member.
# chgrp <group with user as member> <file with bad group ownership>
Document all changes.

STIG check 151 of 571 in the Oracle Linux 5 STIG checklist

← Previous · V-218312All files and directories contained in interactive user home directories must be owned by the home directorys owner.Next · V-218314 →All files and directories contained in user home directories must have mode 0750 or less permissive.