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TMA-COS-6.2.8

Ensure users' home directories permissions are 750 or more restrictive

BajaNivel 2Revisión manualcos

Descripción

While the system administrator can establish secure permissions for users' home directories, the users can easily override these. Group or world-writable user home directories may enable malicious users to steal or modify other users' data or to gain another user's system privileges.

Cómo se verifica

Método de auditoría: Revisión manual

Esta recomendación no se puede verificar automáticamente. Un escaneo la lista con estas instrucciones cuando se pasa --include-manual.

Run the following script and verify no results are returned: #!/bin/bash grep -E -v '^(system-halt|sync|system-shutdown)' /etc/passwd | awk -F: '($7 != "'"$(which nologin)"'" && $7 != "/bin/false") { print $1 " " $6 }' | while read user dir; do if [ ! -d "$dir" ]; then echo "The home directory ($dir) of user $user does not exist." else dirperm=$(ls -ld $dir | cut -f1 -d" ") if [ $(echo $dirperm | cut -c6) != "-" ]; then echo "Group Write permission set on the home directory ($dir) of user $user" fi if [ $(echo $dirperm | cut -c8) != "-" ]; then echo "Other Read permission set on the home directory ($dir) of user $user" fi if [ $(echo $dirperm | cut -c9) != "-" ]; then echo "Other Write permission set on the home directory ($dir) of user $user" fi if [ $(echo $dirperm | cut -c10) != "-" ]; then echo "Other Execute permission set on the home directory ($dir) of user $user" fi fi done

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Making global modifications to user home directories without alerting the user community can result in unexpected outages and unhappy users. Therefore, it is recommended that a monitoring policy be established to report user file permissions and determine the action to be taken in accordance with site policy.

Propiedades

Sistemas operativos
Cualquiera
Etiquetas
access-controlcontainer-optimized-oscos
Referencia
CIS Google Container-Optimized OS Benchmark v1.2.0 - 6.2.8 Ensure users' home directories permissions are 750 or more restrictive