The Ubuntu operating system default filesystem permissions must be defined in such a way that all authenticated users can read and modify only their own files.
An XCCDF Rule
Description
<VulnDiscussion>Setting the most restrictive default permissions ensures that when new accounts are created they do not have unnecessary access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-238209r653802_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure the system to define the default permissions for all authenticated users in such a way that the user can read and modify only their own files.
Edit the "UMASK" parameter in the "/etc/login.defs" file to match the example below:
UMASK 077