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

MédiaNível 1Automatizadanginx

Descrição

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.

Como é verificado

Método de auditoria: Comando shell

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"}'

Saída esperada: compliant

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

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.

Propriedades

Sistemas operacionais: Qualquer
Tags: nginxlogging
Referência: CIS NGINX Benchmark v3.0.0 - 3.3 Ensure error logging is enabled and set to the info logging level

Verificar este host

Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.

shell

tmaegis scan --target nginx