TMA-APACHE-8.4

Ensure ETag Response Header Fields Do Not Include Inodes

低レベル 2自動apache

説明

The FileETag directive configures the file attributes that are used to create the ETag (entity tag) response header field when the document is based on a static file. The ETag value is used in cache management to save network bandwidth. The value returned may be based on combinations of the file inode, the modification time, and the file size. No FileETag directive may include All, INode or +INode (absent is compliant; the default is MTime Size). Reads the main configuration (APACHE_CONF overrides; default /etc/apache2/apache2.conf, /etc/httpd/conf/httpd.conf or /usr/local/apache2/conf/httpd.conf) and every Include/IncludeOptional file.

チェック方法

監査方法: シェルコマンド

shell

c=${APACHE_CONF:-}; if [ -z "$c" ]; then for f in /etc/apache2/apache2.conf /etc/httpd/conf/httpd.conf /usr/local/apache2/conf/httpd.conf /etc/apache2/httpd.conf; do [ -f "$f" ] && { c=$f; break; }; done; fi; [ -r "$c" ] || exit 1; R=$(awk 'tolower($1)=="serverroot"{v=$2; gsub(/"/,"",v); print v; exit}' "$c"); [ -n "$R" ] || R=$(dirname "$c"); shopt -s nocasematch; inc(){ local p g l; [ ${#FUNCNAME[@]} -lt 16 ] || return 0; p=$1; case $p in /*) ;; *) p=$R/$p;; esac; [ -d "$p" ] && p="$p/*"; for g in $p; do [ -f "$g" ] || continue; while IFS= read -r l || [ -n "$l" ]; do if [[ $l =~ ^[[:space:]]*include(optional)?[[:space:]]+\"?([^\"[:space:]]+) ]]; then inc "${BASH_REMATCH[2]}"; else printf '%s\n' "$l"; fi; done < "$g"; done; }; cfg=$(inc "$c" | sed -e 's/^[[:space:]]*//' -e '/^#/d' -e '/^$/d'); shopt -u nocasematch; printf '%s\n' "$cfg" | awk 'tolower($1)=="fileetag"{for(i=2;i<=NF;i++){t=tolower($i); if(t=="all"||t=="inode"||t=="+inode") bad=1}} END{print bad?"noncompliant":"compliant"}'

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

Remove FileETag or set FileETag None (or MTime Size). Then run apachectl configtest and reload Apache.

プロパティ

オペレーティングシステム: すべて
タグ: apacheinformation-disclosure
参照: CIS Apache HTTP Server 2.4 Benchmark v2.4.0 - 8.4 Ensure ETag Response Header Fields Do Not Include Inodes

このホストをチェック

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 apache --level 2