Ensure that NGINX is run using a non-privileged, dedicated service account

高レベル 1自動nginx

説明

The NGINX master process typically runs as root to bind to privileged ports and manage resources, but it spawns worker processes to handle the actual client traffic. The user directive in the main configuration designates the operating system account under which these worker processes run. Compliant when the user directive names an account whose UID is not 0 and which is not in the root, wheel, sudo or admin groups (sudo rights are not checked). 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=$(nginx -T 2>/dev/null) || exit 1; u=$(printf '%s\n' "$out" | awk '$1=="user"{x=$2; sub(/;$/,"",x); print x; exit}'); [ -n "$u" ] || { echo noncompliant; exit 0; }; id=$(id -u "$u" 2>/dev/null) || { echo noncompliant; exit 0; }; g=$(id -Gn "$u" 2>/dev/null); [ "$id" != 0 ] && ! printf ' %s ' "$g" | grep -Eq ' (root|wheel|sudo|admin) ' && echo compliant || echo 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

Create a dedicated system account (e.g. useradd -r -s /sbin/nologin nginx), set 'user nginx;' in the main context of nginx.conf and remove the account from privileged groups. 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: nginxaccounts
参照: CIS NGINX Benchmark v3.0.0 - 2.2.1 Ensure that NGINX is run using a non-privileged, dedicated service account

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