RHEL 8 must define default permissions for logon and non-logon shells.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-230385r792902_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure the operating system 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/bashrc", "/etc/csh.cshrc" and "/etc/profile"files to "077":
UMASK 077