Ensure sendmail PrivacyOptions is configured

보통레벨 1자동aix

설명

The recommendation is to ensure that PrivacyOptions includes at least three settings: authwarnings (a default) novrfy noexpn The sendmail deamon has a history of security vulnerabilities. The recommendation is to modify default sendmail settings that otherwise may provide information that can be used by an attacker. novrfy: No Verify: do not verify valid email addresses. Audit: automated read-only check derived from the CIS audit procedure; it prints "compliant" when the control is met.

점검 방법

감사 방식: 셸 명령

shell

out=$(grep -i "^O PrivacyOptions" /etc/mail/sendmail.cf 2>/dev/null) || exit 1; r=compliant; for o in authwarnings novrfy noexpn; do printf '%s\n' "$out" | grep -iq "$o" || r="missing PrivacyOption $o"; done; echo "$r"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Edit the /etc/mail/sendmail.cf file and add any missing options to the O PrivacyOptions directive. Example O PrivacyOptions=authwarnings noexpn novrfy NOTE: sendmail.cf supports the use of both the comma and space characters to separate the options.

속성

운영 체제: 모두
태그: aixservices
참고 자료: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.4.2 Ensure sendmail PrivacyOptions is configured

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shell

tmaegis scan --target aix