Ensure session initiation information is collected

低レベル 2自動linux

説明

Monitor session initiation events. The parameters in this section track changes to the files associated with session events. • /var/run/utmp - tracks all currently logged in users. • /var/log/wtmp - file tracks logins, logouts, shutdown, and reboot events. • /var/log/btmp - keeps track of failed login attempts and can be read by entering the command /usr/bin/last -f /var/log/btmp. All audit records will be tagged with the identifier "session."

チェック方法

監査方法: シェルコマンド

shell

alt0() { o=$(bash -c 'awk '"'"'/^ *-w/ &&(/\/var\/run\/utmp/ ||/\/var\/log\/wtmp/ ||/\/var\/log\/btmp/) &&/ +-p *wa/ &&(/ key= *[!-~]* *$/||/ -k *[!-~]* *$/)'"'"' /etc/audit/rules.d/*.rules' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /var/run/utmp -p wa -k session' || { echo step1: missing '-w /var/run/utmp -p wa -k session'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /var/log/wtmp -p wa -k session' || { echo step1: missing '-w /var/log/wtmp -p wa -k session'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /var/log/btmp -p wa -k session' || { echo step1: missing '-w /var/log/btmp -p wa -k session'; return 1; }; o=$(bash -c 'auditctl -l | awk '"'"'/^ *-w/ &&(/\/var\/run\/utmp/ ||/\/var\/log\/wtmp/ ||/\/var\/log\/btmp/) &&/ +-p *wa/ &&(/ key= *[!-~]* *$/||/ -k *[!-~]* *$/)'"'"'' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /var/run/utmp -p wa -k session' || { echo step2: missing '-w /var/run/utmp -p wa -k session'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /var/log/wtmp -p wa -k session' || { echo step2: missing '-w /var/log/wtmp -p wa -k session'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-w /var/log/btmp -p wa -k session' || { echo step2: missing '-w /var/log/btmp -p wa -k session'; return 1; }; }; if alt0; then echo compliant; fi

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

Edit or create a file in the /etc/audit/rules.d/ directory, ending in .rules extension, with the relevant rules to monitor session initiation information. Example: # printf " -w /var/run/utmp -p wa -k session -w /var/log/wtmp -p wa -k session -w /var/log/btmp -p wa -k session " >> /etc/audit/rules.d/50-session.rules Merge and load the rules into active configuration: # augenrules --load Check if reboot is required. # if [[ $(auditctl -s | grep "enabled") =~ "2" ]]; then printf "Reboot required to load rules\n"; fi

プロパティ

オペレーティングシステム: rhel-8
タグ: cis-convertedlinux
参照: CIS Red Hat Enterprise Linux 8 Benchmark v4.0.0 - 6.3.3.11

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監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target linux --level 2