TMA-NGINX-3.3

Ensure error logging is enabled and set to the info logging level

中レベル 1自動nginx

説明

The error_log directive configures logging for server errors and operational messages. Unlike access logs, error logs capture diagnostic information about failed requests, upstream connection issues, and configuration errors. The log level determines the verbosity of these messages and should be set to capture sufficient detail (typically notice or info) without overwhelming the storage system. error_log must be defined outside server/location blocks, and no error_log may point to /dev/null or use the crit, alert or emerg level. 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} $1=="error_log" && !inb("server") && !inb("location"){n++; f=a(2); l=a(3); if(f=="/dev/null"||l~/^(crit|alert|emerg)$/) bad=1} $1=="error_log" && (inb("server")||inb("location")) {f=a(2); l=a(3); if(f=="/dev/null"||l~/^(crit|alert|emerg)$/) bad=1} {o=gsub(/\{/,"{"); c=gsub(/\}/,"}"); while(o-->0){sp++; b=$1; sub(/\{.*/,"",b); st[sp]=b} while(c-->0 && sp>0) sp--} END{print (n>0&&!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

Set 'error_log /var/log/nginx/error.log info;' (or notice, per your logging policy) at the top of nginx.conf. 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: nginxlogging
参照: CIS NGINX Benchmark v3.0.0 - 3.3 Ensure error logging is enabled and set to the info logging level

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