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TMA-UBUNTU2004-6.3.4.1

Ensure audit log files mode is configured

NiedrigStufe 2Automatisiertlinux

Beschreibung

Audit log files contain information about the system and system activity.

So wird geprüft

Prüfmethode: Shell-Befehl

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

{
   l_perm_mask="0137"
   if [ -e "/etc/audit/auditd.conf" ]; then
      l_audit_log_directory="$(dirname "$(awk -F= '"'"'/^\s*log_file\s*/{print $2}'"'"' /etc/audit/auditd.conf | xargs)")"
      if [ -d "$l_audit_log_directory" ]; then
         l_maxperm="$(printf '"'"'%o'"'"' $(( 0777 & ~$l_perm_mask )) )"
         a_files=()
         while IFS= read -r -d $'"'"'\0'"'"' l_file; do
            [ -e "$l_file" ] && a_files+=("$l_file")
         done < <(find "$l_audit_log_directory" -maxdepth 1 -type f -perm /"$l_perm_mask" -print0)


 if (( "${#a_files[@]}" > 0 )); then
            for l_file in "${a_files[@]}"; do
               l_file_mode="$(stat -Lc '"'"'%#a'"'"' "$l_file")"
               echo -e "\n- Audit Result:\n  ** FAIL **\n  - File: \"$l_file\" is mode: \"$l_file_mode\"\n (should be mode: \"$l_maxperm\" or more restrictive)\n"
            done
         else
            echo -e "\n- Audit Result:\n  ** PASS **\n  - All files in \"$l_audit_log_directory\" are mode: \"$l_maxperm\" or more restrictive"
         fi
      else
         echo -e "\n- Audit Result:\n  ** FAIL **\n  - Log file directory not set in \"/etc/audit/auditd.conf\" please set log file directory"
      fi
   else
      echo -e "\n- Audit Result:\n  ** FAIL **\n  - File: \"/etc/audit/auditd.conf\" not found.\n  - ** Verify auditd is installed **"
   fi
}' 2>&1); printf '%s\n' "$o" | grep -q '\*\* PASS \*\*' || { echo "step1: script did not report PASS"; return 1; }; }; if alt0; then echo compliant; fi
Erwartete Ausgabe
compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

Run the following command to remove more permissive mode than 0640 from audit log files: # [ -f /etc/audit/auditd.conf ] && find "$(dirname $(awk -F "=" '/^\s*log_file/ {print $2}' /etc/audit/auditd.conf | xargs))" -type f -perm /0137 -exec chmod u-x,g-wx,o-rwx {} +

Eigenschaften

Betriebssysteme
ubuntu-20.04
Tags
cis-convertedlinux
Referenz
CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 - 6.3.4.1

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