Ensure changes to system administration scope (sudoers) is collected

BajaNivel 2Automatizadalinux

Descripción

Monitor scope changes for system administrators. If the system has been properly configured to force system administrators to log in as themselves first and then use the sudo command to execute privileged commands, it is possible to monitor changes in scope. The file /etc/sudoers or a file in the /etc/sudoers.d directory will be written to when the file or its attributes have changed. Note: Reloading the auditd config to set active settings may require a system reboot.

Cómo se verifica

Método de auditoría: Comando de shell

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; o=$(bash -c 'grep scope /etc/audit/rules.d/*.rules' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/scope.rules:-w /etc/sudoers -p wa -k scope' || { echo step1: missing '/etc/audit/rules.d/scope.rules:-w /etc/sudoers -p wa -k scop'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/scope.rules:-w /etc/sudoers.d/ -p wa -k scope' || { echo step1: missing '/etc/audit/rules.d/scope.rules:-w /etc/sudoers.d/ -p wa -k s'; return 1; }; command -v auditctl >/dev/null 2>&1 || { echo "step2: auditctl not installed"; return 1; }; command -v grep >/dev/null 2>&1 || { echo "step2: grep not installed"; return 1; }; o=$(bash -c 'auditctl -l | grep scope' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/sudoers -p wa -k scope' || { echo step2: missing '-w /etc/sudoers -p wa -k scope'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/sudoers.d -p wa -k scope' || { echo step2: missing '-w /etc/sudoers.d -p wa -k scope'; return 1; }; }; if alt0; then echo compliant; fi

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Edit or create a file in the /etc/audit/rules.d/ directory ending in .rules Example: vi /etc/audit/rules.d/scope.rules and add the following lines: -w /etc/sudoers -p wa -k scope -w /etc/sudoers.d/ -p wa -k scope

Propiedades

Sistemas operativos: sles-12
Etiquetas: cis-convertedlinux
Referencia: CIS SUSE Linux Enterprise 12 Benchmark v3.2.0 - 4.1.14

Verificar este host

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

shell

tmaegis scan --target linux --level 2