Ensure SSH LogLevel is appropriate

MittelStufe 1Automatisiertlinux

Beschreibung

INFO level is the basic level that only records login activity of SSH users. In many situations, such as Incident Response, it is important to determine when a particular user was active on a system. The logout record can eliminate those users who disconnected, which helps narrow the field. VERBOSE level specifies that login and logout activity as well as the key fingerprint for any SSH key used for login will be logged. This information is important for SSH key management, especially in legacy environments.

So wird geprüft

Prüfmethode: Shell-Befehl

shell

alt0() { command -v grep >/dev/null 2>&1 || { echo "step1: grep not installed"; return 1; }; command -v sshd >/dev/null 2>&1 || { echo "step1: sshd not installed"; return 1; }; o=$(bash -c 'sshd -T | grep loglevel' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- 'LogLevel VERBOSE' || { echo step1: missing 'LogLevel VERBOSE'; return 1; }; }; if alt0; then echo compliant; fi

Erwartete Ausgabe: compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

Edit the /etc/ssh/sshd_config file to set the parameter as follows: LogLevel VERBOSE or LogLevel INFO Restart sshd : systemctl restart sshd

Eigenschaften

Betriebssysteme: alinux-2
Tags: cis-convertedlinux
Referenz: CIS Aliyun Linux 2 Benchmark v1.0.0 ARCHIVE - 5.2.5

Diesen Host prüfen

Führen Sie dies auf einem Rechner aus, den Sie prüfen dürfen. Der Scan ist schreibgeschützt.

shell

tmaegis scan --target linux