Title

SLEM 5 default permissions must be defined in such a way that all authenticated users can only read and modify their own files. (Cat II impact)

Discussion

Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access.

Check Content

Verify SLEM 5 defines default permissions for all authenticated users in such a way that the users can only read and modify their own files with the following command: > grep -i "^umask" /etc/login.defs UMASK 077 If the "UMASK" variable is set to "000", the severity is raised to a CAT I and this is a finding. If the value of "UMASK" is not set to "077", the line is commented out, or the line is missing, this is a finding.

Fix Text

Configure SLEM 5 to define the default permissions for all authenticated users in such a way that the users can only read and modify their own files. Add or modify the following line in the "/etc/login.defs" file: UMASK 077

Additional Identifiers

Rule ID: SV-261349r996502_rule

Vulnerability ID: V-261349

Group Title: SRG-OS-000480-GPOS-00228

Expert Comments

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