Configure maxHttpHeaderSize

BajaNivel 2Automatizadatomcat

Descripción

The maxHttpHeaderSize limits the size of the request and response headers defined in bytes. No Connector may raise maxHttpHeaderSize above 8192 bytes (unset means the default 8192). Reads $CATALINA_BASE (default /opt/tomcat) and $CATALINA_HOME (default: $CATALINA_BASE); set them for packaged installs (e.g. CATALINA_BASE=/var/lib/tomcat10, CATALINA_HOME=/usr/share/tomcat10). XML comments are ignored.

Cómo se verifica

Método de auditoría: Comando de shell

shell

B=${CATALINA_BASE:-/opt/tomcat}; H=${CATALINA_HOME:-$B}; O=${TOMCAT_OWNER:-tomcat_admin}; G=${TOMCAT_GROUP:-tomcat}; x(){ [ -r "$1" ] || return 1; awk 'BEGIN{RS="<!--"} NR==1{print;next} {i=index($0,"-->"); if(i) print substr($0,i+3)}' "$1" | tr '\n\t\r' '   ' | tr '<' '\n'; }; s=$(x "$B/conf/server.xml") || exit 1; printf '%s\n' "$s" | awk 'function at(n,  r){if(match($0,"[[:space:]]" n "[[:space:]]*=[[:space:]]*[\"\047][^\"\047]*")){r=substr($0,RSTART,RLENGTH); sub(/^[^=]*=[[:space:]]*./,"",r); return r} return "-unset-"} /^Connector[[:space:]]/{v=at("maxHttpHeaderSize"); if(v!="-unset-" && (v+0<1 || v+0>8192)) bad=1} END{print bad?"noncompliant":"compliant"}'

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Set maxHttpHeaderSize="8192" on each <Connector> in server.xml. Restart Tomcat afterwards.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: tomcatdos
Referencia: CIS Apache Tomcat 10.1 Benchmark v1.0.0 - 10.10 Configure maxHttpHeaderSize

Verificar este host

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

shell

tmaegis scan --target tomcat --level 2