Ensure events that modify user/group information are collected

BajaNivel 2Automatizadalinux

Descripción

Record events affecting the group , passwd (user IDs), shadow and gshadow (passwords) or /etc/security/opasswd (old passwords, based on remember parameter in the PAM configuration) files. The parameters in this section will watch the files to see if they have been opened for write or have had attribute changes (e.g. permissions) and tag them with the identifier "identity" in the audit log file. 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=$(bash -c 'grep identity /etc/audit/rules.d/*.rules' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/identity.rules:-w /etc/group -p wa -k identity' || { echo step1: missing '/etc/audit/rules.d/identity.rules:-w /etc/group -p wa -k ide'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/identity.rules:-w /etc/passwd -p wa -k identity' || { echo step1: missing '/etc/audit/rules.d/identity.rules:-w /etc/passwd -p wa -k id'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/identity.rules:-w /etc/shadow -p wa -k identity' || { echo step1: missing '/etc/audit/rules.d/identity.rules:-w /etc/shadow -p wa -k id'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '/etc/audit/rules.d/identity.rules:-w /etc/security/opasswd -p wa -k identity' || { echo step1: missing '/etc/audit/rules.d/identity.rules:-w /etc/security/opasswd -'; return 1; }; command -v auditctl >/dev/null 2>&1 || { echo "step2: auditctl not installed"; return 1; }; command -v grep >/dev/null 2>&1 || { echo "step2: grep not installed"; return 1; }; o=$(bash -c 'auditctl -l | grep identity' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/group -p wa -k identity' || { echo step2: missing '-w /etc/group -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/passwd -p wa -k identity' || { echo step2: missing '-w /etc/passwd -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/shadow -p wa -k identity' || { echo step2: missing '-w /etc/shadow -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/security/opasswd -p wa -k identity' || { echo step2: missing '-w /etc/security/opasswd -p wa -k identity'; 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/identity.rules and add the following lines: -w /etc/group -p wa -k identity -w /etc/passwd -p wa -k identity -w /etc/shadow -p wa -k identity -w /etc/security/opasswd -p wa -k identity

Propiedades

Sistemas operativos: sles-12
Etiquetas: cis-convertedlinux
Referencia: CIS SUSE Linux Enterprise 12 Benchmark v3.2.0 - 4.1.4

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