Ensure only modern TLS protocols are used

높음레벨 1자동nginx

설명

Only modern TLS protocols should be enabled in NGINX for all client connections and upstream connections. Removing legacy TLS and SSL protocols (SSL 3.0, TLS 1.0, 1.1 and 1.2), and enable stable TLS protocols (TLS 1.3), ensures users are able to take advantage of strong security capabilities and protects them from insecure legacy protocols. Every ssl_protocols (and proxy_ssl_protocols) directive must be exactly TLSv1.3, at least one ssl_protocols must exist, and when proxy_pass https:// is used proxy_ssl_protocols must be set. 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.

점검 방법

감사 방식: 셸 명령

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=="ssl_protocols"{n++; if(NF!=2 || a(2)!="TLSv1.3") bad=1} $1=="proxy_ssl_protocols"{pp=1; if(NF!=2 || a(2)!="TLSv1.3") bad=1} $1=="proxy_pass" && a(2)~/^https:/ {hp=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&&(!hp||pp))?"compliant":"noncompliant"}'

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Set 'ssl_protocols TLSv1.3;' in the http/server blocks and 'proxy_ssl_protocols TLSv1.3;' where proxying to TLS upstreams. Then run nginx -t and reload nginx.

속성

운영 체제: 모두
태그: nginxtls
참고 자료: CIS NGINX Benchmark v3.0.0 - 4.1.4 Ensure only modern TLS protocols are used

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target nginx