Ensure Browser Framing Is Restricted

낮음레벨 2자동apache

설명

To prevent Clickjacking or UI Redressing attacks, it's important for the server to include an HTTP header which instructs browsers to restrict the content from being framed. There are two headers that may be used. The Content-Security-Policy header, or the X- Frame-Options header. The Header directive allows server HTTP response headers to be added, replaced or merged. Compliant when a Header always set/append Content-Security-Policy with frame-ancestors 'none' or 'self', or a Header always set/append X-Frame-Options SAMEORIGIN/DENY, is configured. 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.

점검 방법

감사 방식: 셸 명령

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 '{l=tolower($0)} l~/^header[[:space:]]+always[[:space:]]+(set|append)[[:space:]]+"?content-security-policy/ && l~/frame-ancestors[[:space:]]+\047?(none|self)/{ok=1} l~/^header[[:space:]]+always[[:space:]]+(set|append)[[:space:]]+"?x-frame-options"?[[:space:]]+"?(sameorigin|deny)/{ok=1} END{print ok?"compliant":"noncompliant"}'

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Header always append Content-Security-Policy "frame-ancestors 'self'" Then run apachectl configtest and reload Apache.

속성

운영 체제: 모두
태그: apacheheaders
참고 자료: CIS Apache HTTP Server 2.4 Benchmark v2.4.0 - 5.16 Ensure Browser Framing Is Restricted

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shell

tmaegis scan --target apache --level 2