TMA-NGINX-4.1.1

Ensure HTTP is redirected to HTTPS

高レベル 1自動nginx

説明

Browsers and clients establish encrypted connections with servers by leveraging HTTPS. Requests leveraging HTTP are unencrypted. Unencrypted requests should be redirected so they are encrypted. Any listening HTTP port on your web server should redirect to a server profile that uses encryption. The default HTTP (unencrypted) port is 80. Every server block listening on plain port 80 must redirect with return 301/302/307/308 https://... or a rewrite to https:// (catch-all blocks may instead return a 4xx/444 code), and at least one TLS listener must exist. Evaluated on the merged configuration printed by `nginx -T` (all included files; needs permission to read them). CIS marks this recommendation Manual; the automated check implements its audit procedure.

チェック方法

監査方法: シェルコマンド

shell

out=$(nginx -T 2>/dev/null) || exit 1; printf '%s\n' "$out" | awk '{l=$0; o=""; q=""; for(i=1;i<=length(l);i++){c=substr(l,i,1); if(q!=""){o=o c; if(c==q) q=""; continue} if(c=="\""||c=="\047"){q=c; o=o c; continue} if(c=="#") break; if(c==";"||c=="{"){print o c; o=""; continue} if(c=="}"){if(o~/[^[:space:]]/) print o; print "}"; o=""; continue} o=o c} if(o~/[^[:space:]]/) print o}' | awk 'function a(i,  x){x=$i; sub(/;$/,"",x); gsub(/["\047]/,"",x); return x} function inb(n,  i){for(i=1;i<=sp;i++) if(st[i]==n) return 1; return 0} $1=="server" && /\{/ && !ins {ins=1; sd=sp+1; pl=0; rd=0} ins && $1=="listen" && $0!~/ssl/ && $0!~/quic/ && (a(2)~/(^|:)80$/ || a(2)=="80") {pl=1} $1=="listen" && ($0~/[[:space:]]ssl/ || $0~/quic/) {tls=1} ins && (($1=="return" && (a(2)~/^4[0-9][0-9]$/ || (a(2)~/^30[1278]$/ && a(3)~/^https:/))) || ($1=="rewrite" && a(3)~/^https:/)) {rd=1}  {o=gsub(/\{/,"{"); c=gsub(/\}/,"}"); while(o-->0){sp++; b=$1; sub(/\{.*/,"",b); st[sp]=b} while(c-->0 && sp>0) sp--} ins && sp<sd {ins=0; if(pl && !rd) bad=1} END{print (tls&&!bad)?"compliant":"noncompliant"}'

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

In each port-80 server block use 'return 301 https://$host$request_uri;'. Then run nginx -t and reload nginx.

プロパティ

オペレーティングシステム: すべて
タグ: nginxtls
参照: CIS NGINX Benchmark v3.0.0 - 4.1.1 Ensure HTTP is redirected to HTTPS

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 nginx