Title

System files and directories must not have uneven access permissions. (Cat II impact)

Discussion

Discretionary access control is undermined if users, other than a file owner, have greater access permissions to system files and directories than the owner.

Check Content

Check system directories for uneven file permissions. Procedure: # ls -lL /etc /bin /usr/bin /usr/ucb /sbin /usr/sbin Uneven file permissions exist if the file owner has less permissions than the group or other user classes. If any of the files in the above listed directories contain uneven file permissions, this is a finding.

Fix Text

Change the mode of files with uneven permissions so owners do not have less permission than group or world users.

Additional Identifiers

Rule ID: SV-227610r854471_rule

Vulnerability ID: V-227610

Group Title: SRG-OS-000312

Expert Comments

CCIs tied to check.

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