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If log_group
in /etc/audit/auditd.conf
is set to a group other than the
root
group account, change the mode of the audit log files with the following command:
$ sudo chmod 0640 audit_file
Otherwise, change the mode of the audit log files with the following command:
$ sudo chmod 0600 audit_file
If users can write to audit logs, audit trails can be modified or destroyed.
The following script can be run on the host to remediate the issue.
#!/bin/bash
# Remediation is applicable only in certain platforms
if [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ] && dpkg-query --show --showformat='${db:Status-Status}\n' 'auditd' 2>/dev/null | grep -q installed; then
if LC_ALL=C grep -iw ^log_file /etc/audit/auditd.conf; then
FILE=$(awk -F "=" '/^log_file/ {print $2}' /etc/audit/auditd.conf | tr -d ' ')
else
FILE="/var/log/audit/audit.log"
fi
if LC_ALL=C grep -m 1 -q ^log_group /etc/audit/auditd.conf; then
GROUP=$(awk -F "=" '/log_group/ {print $2}' /etc/audit/auditd.conf | tr -d ' ')
if ! [ "${GROUP}" == 'root' ] ; then
chmod 0640 $FILE
chmod 0440 $FILE.*
else
chmod 0600 $FILE
chmod 0400 $FILE.*
fi
else
chmod 0600 $FILE
chmod 0400 $FILE.*
fi
else
>&2 echo 'Remediation is not applicable, nothing was done'
fi