Set root Ownership of BIND Configuration Files

中级别 1自动化bind

说明

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.

检查方式

审计方法: Shell 命令

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'; }

预期输出: compliant

修复方式

修复方法: 操作指南或基础设施补丁

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

属性

操作系统: 任意
标签: binddnspermissions
参考: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 2.5 Set root Ownership of BIND Configuration Files

检查本机

请在您有权审计的机器上运行此命令。扫描为只读操作。

shell

tmaegis scan --target bind