Apache HTTP Server
TMA-APACHE-9.5
Ensure the Timeout Limits for Request Headers is Set to 40 or Less
Description
The RequestReadTimeout directive allows configuration of timeout limits for client requests. The header portion of the directive provides for an initial timeout value, a maximum timeout and a minimum rate. The minimum rate specifies that after the initial timeout, the server will wait an additional 1 second for each N bytes received. The recommended setting is to have a maximum timeout of 40 seconds or less. Every RequestReadTimeout must limit the header timeout to 40 seconds or less (upper bound of a range); without RequestReadTimeout the mod_reqtimeout default (header=20-40) is compliant when the module is loaded. Reads the main configuration (APACHE_CONF overrides; default /etc/apache2/apache2.conf, /etc/httpd/conf/httpd.conf or /usr/local/apache2/conf/httpd.conf) and every Include/IncludeOptional file. Uses the module list from apachectl -M (apache2ctl/httpd; needs root). CIS marks this recommendation Manual; the automated check implements its audit procedure.
Méthode de vérification
Méthode d'audit: Commande shell
c=${APACHE_CONF:-}; if [ -z "$c" ]; then for f in /etc/apache2/apache2.conf /etc/httpd/conf/httpd.conf /usr/local/apache2/conf/httpd.conf /etc/apache2/httpd.conf; do [ -f "$f" ] && { c=$f; break; }; done; fi; [ -r "$c" ] || exit 1; R=$(awk 'tolower($1)=="serverroot"{v=$2; gsub(/"/,"",v); print v; exit}' "$c"); [ -n "$R" ] || R=$(dirname "$c"); shopt -s nocasematch; inc(){ local p g l; [ ${#FUNCNAME[@]} -lt 16 ] || return 0; p=$1; case $p in /*) ;; *) p=$R/$p;; esac; [ -d "$p" ] && p="$p/*"; for g in $p; do [ -f "$g" ] || continue; while IFS= read -r l || [ -n "$l" ]; do if [[ $l =~ ^[[:space:]]*include(optional)?[[:space:]]+\"?([^\"[:space:]]+) ]]; then inc "${BASH_REMATCH[2]}"; else printf '%s\n' "$l"; fi; done < "$g"; done; }; cfg=$(inc "$c" | sed -e 's/^[[:space:]]*//' -e '/^#/d' -e '/^$/d'); shopt -u nocasematch; b=$(command -v apache2ctl || command -v apachectl || command -v httpd) || exit 1; m=$("$b" ${APACHE_CONF:+-f "$APACHE_CONF"} -M 2>/dev/null) || exit 1; printf '%s\n' "$m" | grep -q reqtimeout_module && r=1 || r=0; printf '%s\n' "$cfg" | awk -v r="$r" 'tolower($1)=="requestreadtimeout"{n++; for(i=2;i<=NF;i++){t=tolower($i); if(t~/^header=/){x=t; sub(/^[a-z]+=/,"",x); sub(/,.*/,"",x); k=split(x,y,"-"); if(y[k]+0>40 || y[k]+0==0) bad=1}}} END{print ((n>0 && !bad) || (n==0 && r))?"compliant":"noncompliant"}'- Sortie attendue
compliant
Méthode de correction
Méthode de correction: Recommandation ou correctif d'infrastructure
Load mod_reqtimeout and set e.g. RequestReadTimeout header=20-40,MinRate=500 body=20,MinRate=500. Then run apachectl configtest and reload Apache.
Propriétés
- Systèmes d'exploitation
- Tous
- Étiquettes
- apachedos
- Référence
- CIS Apache HTTP Server 2.4 Benchmark v2.4.0 - 9.5 Ensure the Timeout Limits for Request Headers is Set to 40 or Less
Vérifier cet hôte
Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.
tmaegis scan --target apache