TMA-APACHE-5.9
Ensure Old HTTP Protocol Versions Are Disallowed
Descripción
The Apache modules mod_rewrite or mod_security can be used to disallow old and invalid HTTP protocols versions. The HTTP version 1.1 RFC is dated June 1999 and has been supported by Apache since version 1.2. It should no longer be necessary to allow ancient versions of HTTP such as 1.0 and prior. The global server context must have RewriteEngine On, a RewriteCond %{THE_REQUEST} !(HTTP/1\.1|HTTP/2\.0)$ condition and a RewriteRule with the [F] flag, and every <VirtualHost> must contain RewriteEngine On and RewriteOptions Inherit. 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.
Cómo se verifica
Método de auditoría: Comando de 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 '/^$/d'); shopt -u nocasematch; printf '%s\n' "$cfg" | awk '{l=tolower($0)} l~/^<virtualhost/{vh=1; nv++; ve=0; vi=0; next} l~/^<\/virtualhost>/{vh=0; if(!(ve&&vi)) bad=1; next} !vh && l~/^rewriteengine[[:space:]]+on/{ge=1} !vh && l~/^rewritecond[[:space:]]+%\{the_request\}[[:space:]]+!/ && l~/http\/1/{gc=1} !vh && l~/^rewriterule[[:space:]]/ && l~/\[([a-z,=]*,)?f(,[a-z,=]*)?\]/{gr=1} vh && l~/^rewriteengine[[:space:]]+on/{ve=1} vh && l~/^rewriteoptions[[:space:]]+.*inherit/{vi=1} END{print (ge&&gc&&gr&&!bad)?"compliant":"noncompliant"}'- Salida esperada
compliant
Cómo se corrige
Método de corrección: Guía o parche de infraestructura
Load mod_rewrite and add globally: RewriteEngine On / RewriteCond %{THE_REQUEST} !(HTTP/1\.1|HTTP/2\.0)$ / RewriteRule .* - [F]; add RewriteEngine On and RewriteOptions Inherit to every <VirtualHost>. Then run apachectl configtest and reload Apache.
Propiedades
- Sistemas operativos
- Cualquiera
- Etiquetas
- apachefeatures
- Referencia
- CIS Apache HTTP Server 2.4 Benchmark v2.4.0 - 5.9 Ensure Old HTTP Protocol Versions Are Disallowed
Verificar este host
Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.
tmaegis scan --target apache