TMA-AIX-4.6.3.15

Ensure sshd PermitRootLogin is disabled

높음레벨 2자동aix

설명

The PermitRootLogin parameter specifies if the root user can log in using SSH. The current default is prohibit-password. Disallowing root logins over SSH requires system admins to authenticate using their own individual account, then escalating to root. This limits opportunity for non- repudiation and provides a clear audit trail in the event of a security incident. Audit: evaluates the effective configuration from `sshd -T` (Match blocks must be reviewed separately).

점검 방법

감사 방식: 셸 명령

shell

command -v sshd >/dev/null 2>&1 || exit 1; out=$(sshd -T 2>/dev/null) || exit 1; r=compliant; for p in '^permitrootlogin[[:blank:]]+no$'; do printf '%s\n' "$out" | grep -Eiq -- "$p" || r="not matched: $p"; done; echo "$r"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

#!/usr/bin/ksh PREFERRED_SETTING="no" umask 077 set $(/usr/bin/egrep "^PermitRootLogin" /etc/ssh/sshd_config) echo $? if [[ ! -z $1 ]]; then # Look for a setting and change to no if anything else if [[ $2 != ${PREFERRED_SETTING} ]]; then sed "s/^PermitRootLogin \{1\}[^ ]\{1,\}/PermitRootLogin ${PREFERRED_SETTING}/" /etc/ssh/sshd_config >/tmp/sshd_config.$$ fi else # Look for a comment and append sed "/^# \{0,\}PermitRootLogin/ a\^JPermitRootLogin ${PREFERRED_SETTING}/" /etc/ssh/sshd_config >/tmp/sshd_config.$$ fi if [[ -e /tmp/sshd_config.$$ ]]; then diff -u /tmp/sshd_config.$$ /etc/ssh/sshd_config rm /tmp/sshd_config.$$ elif # Verify setting is specified /usr/bin/egrep "^PermitRootLogin" /etc/ssh/sshd_config >>/dev/null if [[ $? -ne 0 ]]; then print "PermitRootLogin ${PREFERRED_SETTING}" >> /etc/ssh/sshd_config fi fi Re-cycle the sshd daemon to pick up the configuration changes: stopsrc -s sshd sleep 5 startsrc -s sshd

속성

운영 체제: 모두
태그: aixssh
참고 자료: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.3.15 Ensure sshd PermitRootLogin is disabled

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shell

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