Detections
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RHEL-09-412070 - RHEL 9 must define default permissions for the system default profile.
Information
The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system.Satisfies: SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00227
Solution
Configure RHEL 9 to define default permissions for all authenticated users in such a way that the user can only read and modify their own files.Add or edit the lines for the "umask" parameter in the "/etc/profile" file to "077":
umask 077
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R9_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 9 STIG v2r9
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-258075r1184324_rule, STIG-ID|RHEL-09-412070, Vuln-ID|V-258075
Plugin: Unix
Control ID: 63fec744538968ea259ce030443235044ddabbe12fed4cdeff462b3f809a2a01