Ensure events that modify user/group information are collected

DüşükDüzey 2Otomatiklinux

Açıklama

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.

Nasıl denetlenir

Denetim yöntemi: Kabuk komutu

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/ $//' | grep -Fxq -- '-w /etc/group -p wa -k identity' || { echo step1: missing '-w /etc/group -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/passwd -p wa -k identity' || { echo step1: missing '-w /etc/passwd -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/gshadow -p wa -k identity' || { echo step1: missing '-w /etc/gshadow -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/shadow -p wa -k identity' || { echo step1: missing '-w /etc/shadow -p wa -k identity'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /etc/security/opasswd -p wa -k identity' || { echo step1: missing '-w /etc/security/opasswd -p wa -k identity'; return 1; }; command -v auditctl >/dev/null 2>&1 || { echo "step2: auditctl not installed"; return 1; }; command -v grep >/dev/null 2>&1 || { echo "step2: grep not installed"; return 1; }; o=$(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/ $//' | grep -Fxq -- '-w /etc/gshadow -p wa -k identity' || { echo step2: missing '-w /etc/gshadow -p wa -k identity'; return 1; }; printf '%s\n' "$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

Beklenen çıktı: compliant

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

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/gshadow -p wa -k identity -w /etc/shadow -p wa -k identity -w /etc/security/opasswd -p wa -k identity Notes: Reloading the auditd config to set active settings requires the auditd service to be restarted, and may require a system reboot.

Özellikler

İşletim sistemleri: ubuntu-18.04
Etiketler: cis-convertedlinux
Referans: CIS Ubuntu Linux 18.04 LTS Benchmark v2.0.1 ARCHIVE - 4.1.4

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shell

tmaegis scan --target linux --level 2