Set root Ownership of BIND Configuration Files

보통레벨 1자동bind

설명

The configuration files in the ISC BIND directories should be owned by root. Of course, any files created at run time by BIND, such as pid files, log files and slave zone files will necessarily be owned by named. The audit lists files under $BIND_HOME, outside the runtime directories, not owned by root and requires none. $BIND_HOME is taken as the existing ones of /var/named (RHEL, including a chroot), /etc/bind and /var/cache/bind (Debian/Ubuntu) and $RUNDIR as /run/named; the runtime directories (dynamic, slaves, data, run, log, tmp, /var/cache/bind) are excluded where the benchmark excludes them.

점검 방법

감사 방식: 셸 명령

shell

BH=''; for d in /var/named /etc/bind /var/cache/bind; do [ -d "$d" ] && BH="$BH $d"; done
[ -n "$BH" ] || { echo 'no BIND directory found'; exit 1; }
RUN=''; for d in /run/named /var/run/named; do [ -d "$d" ] && { RUN=$d; break; }; done
G='-group root'; U='-user root'; for a in named bind; do grep -q "^$a:" /etc/group 2>/dev/null && G="$G -o -group $a"; grep -q "^$a:" /etc/passwd 2>/dev/null && U="$U -o -user $a"; done
RT='^(/var/named(/chroot/var/named)?/(dynamic|slaves|data)|/var/named/chroot/(var/)?run/named|/var/named/chroot/var/log|/var/named/chroot/(var/)?tmp|/var/cache/bind|/run/named|/var/run/named)(/|$)'
out=$(find $BH -type f \! -user root -print 2>/dev/null | { grep -Ev "$RT" || true; }) || exit 1
[ -z "$out" ] && echo compliant || { printf '%s\n' "$out" | head -n 20; echo 'files not owned by root'; }

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Perform the following: ; Capture the output of the previous audit command to a file named nonroot- files.txt and review any files not owned by root to ensure the files are necessary and are not expected run-time files. Delete any unnecessary files, and ensure any run-time files are being created in the appropriate run-time directory. # find $BIND_HOME -type f \! -user root | egrep -v \ \^$DYNDIR\|\^$SLAVEDIR\|\^$DATADIR\|\^$RUNDIR\|\^$LOGDIR\|\^$TMPDIR > \ $TMPDIR/nonroot-files.txt ; The remaining non-run-time files should be changed to be owned by root, with a command like the following: \# cat $TMPDIR/nonroot-files.txt | xargs chown root \# rm $TMPDIR/nonroot-files.txt

속성

운영 체제: 모두
태그: binddnspermissions
참고 자료: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 2.5 Set root Ownership of BIND Configuration Files

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shell

tmaegis scan --target bind