Ensure access logging is enabled

MediaNivel 1Automatizadanginx

Descripción

The access_log directive enables the logging of client requests. While NGINX enables this by default, it allows granular control per server or location context. Based on enterprise requirements, the log should be enriched with relevant variables or converted to structured JSON format for modern SIEM integration. Refer to Recommendation 3.1 for detailed configuration of log formats and variables. Fails when access_log off is used outside a location block (in the http or a server context); location-level exclusions for static assets are allowed. 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.

Cómo se verifica

Método de auditoría: Comando de 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=="access_log" && a(2)=="off" && !inb("location"){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 bad?"noncompliant":"compliant"}'

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Replace 'access_log off;' at http/server level with 'access_log /var/log/nginx/access.log <format>;'. Then run nginx -t and reload nginx.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: nginxlogging
Referencia: CIS NGINX Benchmark v3.0.0 - 3.2 Ensure access logging is enabled

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target nginx