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TMA-RHEL9-7.1.11

Ensure world writable files and directories are secured

MoyenneNiveau 1Automatiséelinux

Description

World writable files are the least secure. Data in world-writable files can be modified and compromised by any user on the system. World writable files may also indicate an incorrectly written script or program that could potentially be the cause of a larger compromise to the system's integrity. See the chmod(2) man page for more information. Setting the sticky bit on world writable directories prevents users from deleting or renaming files in that directory that are not owned by them.

Méthode de vérification

Méthode d'audit: Commande shell

shell
alt0() { o=$(bash -c '#!/usr/bin/env bash

{
   a_path=(-path "*/containers/storage/*" -o -path "*/containerd/*" -o -path "*/kubelet/*" -o -path "*/docker/*" -o -path "/sys/*" -o -path "/snap/*" -o - path "/boot/efi/*")
   while IFS= read -r l_mount; do
      find "$l_mount" -mount -xdev \( "${a_path[@]}" \) -prune -o \
         \( \( -type f -perm -0002 \) -o \( -type d -perm -0002 ! -perm -1000 \) \) \
         -printf '"'"'%y %p\n'"'"' 2>/dev/null
   done < <(findmnt -Dkerno fstype,target | awk '"'"'($1 !~ /^[[:space:]]*(nfs|proc|cifs|smb|vfat|iso9660|efivarfs|selinuxfs|ncpfs)/ && $2 !~ /^(\/run|\/tmp|\/var\/tmp)(\/|$)/){print $2}'"'"')
}' 2>&1); [ -z "$o" ] || { echo "step1: $o" | head -c 300; return 1; }; }; if alt0; then echo compliant; fi
Sortie attendue
compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

• World Writable Files: o It is recommended that write access is removed from other with the command ( chmod o-w <filename> ), but always consult relevant vendor documentation to avoid breaking any application dependencies on a given file. • World Writable Directories: o Set the sticky bit on all world writable directories with the command ( chmod a+t <directory_name> ) Run the following script to: • Remove other write permission from any world writable files • Add the sticky bit to all world writable directories #!/usr/bin/env bash { l_smask='01000' a_file=() a_dir=() a_path=(-path "*/containers/storage/*" -o -path "*/containerd/*" -o -path "*/kubelet/*" -o -path "*/docker/*" -o -path "/sys…

Propriétés

Systèmes d'exploitation
rhel-9
Étiquettes
cis-convertedlinux
Référence
CIS Red Hat Enterprise Linux 9 Benchmark v3.0.0 - 7.1.11

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

shell
tmaegis scan --target linux