Ensure world writable files and directories are secured

中等級 1自動化linux

說明

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.

檢查方式

稽核方法: Shell 指令

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

預期輸出: compliant

修補方式

修補方法: 操作指南或基礎設施修補檔

• 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…

屬性

作業系統: rocky-9
標籤: cis-convertedlinux
參考資料: CIS Rocky Linux 9 Benchmark v3.0.0 - 7.1.11

檢查此主機

請在您有權稽核的機器上執行此指令。掃描為唯讀操作。

shell

tmaegis scan --target linux