TMAegis
linux のその他のルール

TMA-ROCKY8-5.4.2.5

Ensure root path integrity

中レベル 1自動linux

説明

The root user can execute any command on the system and could be fooled into executing programs unintentionally if the PATH is not set correctly.

チェック方法

監査方法: シェルコマンド

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

{
   l_output2=""
   l_pmask="0022"
   l_maxperm="$( printf '"'"'%o'"'"' $(( 0777 & ~$l_pmask )) )"
   l_root_path="$(sudo -Hiu root env | grep '"'"'^PATH'"'"' | cut -d= -f2)"
   unset a_path_loc && IFS=":" read -ra a_path_loc <<< "$l_root_path"
   grep -q "::" <<< "$l_root_path" && l_output2="$l_output2\n - root'"'"'s path contains a empty directory (::)"
   grep -Pq ":\h*$" <<< "$l_root_path" && l_output2="$l_output2\n - root'"'"'s path contains a trailing (:)"
   grep -Pq '"'"'(\h+|:)\.(:|\h*$)'"'"' <<< "$l_root_path" && l_output2="$l_output2\n - root'"'"'s path contains current working directory (.)"
   while read -r l_path; do
      if [ -d "$l_path" ]; then
         while read -r l_fmode l_fown; do
            [ "$l_fown" != "root" ] && l_output2="$l_output2\n - Directory: \"$l_path\" is owned by: \"$l_fown\" should be owned by \"root\""
            [ $(( $l_fmode & $l_pmask )) -gt 0 ] && l_output2="$l_output2\n - Directory: \"$l_path\" is mode: \"$l_fmode\" and should be mode: \"$l_maxperm\" or more restrictive"
         done <<< "$(stat -Lc '"'"'%#a %U'"'"' "$l_path")"
      else
         l_output2="$l_output2\n - \"$l_path\" is not a directory"
      fi
   done <<< "$(printf "%s\n" "${a_path_loc[@]}")"
   if [ -z "$l_output2" ]; then
      echo -e "\n- Audit Result:\n  *** PASS ***\n - Root'"'"'s path is correctly configured\n"
   else
      echo -e "\n- Audit Result:\n  ** FAIL **\n - * Reasons for audit failure * :\n$l_output2\n"
   fi
}' 2>&1); printf '%s\n' "$o" | grep -q '\*\* PASS \*\*' || { echo "step1: script did not report PASS"; return 1; }; }; if alt0; then echo compliant; fi
期待される出力
compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

Correct or justify any: • Locations that are not directories • Empty directories (::) • Trailing (:) • Current working directory (.) • Non root owned directories • Directories that less restrictive than mode 0755

プロパティ

オペレーティングシステム
rocky-8
タグ
cis-convertedlinux
参照
CIS Rocky Linux 8 Benchmark v3.0.0 - 5.4.2.5

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監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell
tmaegis scan --target linux