Detections
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1.133 ALMA-09-017730

Information

AlmaLinux OS 9 must define default permissions for PAM users.

GROUP ID: V-269236
RULE ID: SV-269236r1050118

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

With a UMASK of 077, files will be created with 0600 permissions (owner read/write only) and directories will have 0700 permissions (owner read/write/execute only).

Solution

Configure AlmaLinux OS 9 to define default permissions for all authenticated users so the user can only read and modify their own files.

Add or edit the following line at the top of /etc/pam.d/postlogin:

session optional pam_umask.so silent

See Also

https://workbench.cisecurity.org/benchmarks/27039

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CCI|CCI-000366, Rule-ID|SV-269236r1050118_rule, STIG-ID|ALMA-09-017730, Vuln-ID|V-269236

Plugin: Unix

Control ID: 4ba66ef51588295f9e86e903af8e860d65e0665ea51d3c3ed498278288d486d9