Ensure sendmail PrivacyOptions is configured

MediaNivel 1Automatizadaaix

Descripción

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.

Cómo se verifica

Método de auditoría: Comando de shell

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"

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

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.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: aixservices
Referencia: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.4.2 Ensure sendmail PrivacyOptions is configured

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target aix