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123 lines
3.3 KiB
Bash
Executable File
123 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# run-shellcheck
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#
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# CIS Debian Hardening
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#
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#
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# 5.2.2 Ensure permissions on SSH private host key files are configured (Scored)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# shellcheck disable=2034
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HARDENING_LEVEL=1
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# shellcheck disable=2034
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DESCRIPTION="Checking permissions and ownership to root 600 for ssh private keys. "
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DIR='/etc/ssh'
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PERMISSIONS='600'
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USER='root'
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GROUP='root'
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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ERRORS=0
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for FILE in $($SUDO_CMD find $DIR -xdev -type f -name 'ssh_host_*_key');
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do
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has_file_correct_permissions "$FILE" "$PERMISSIONS"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE permissions were set to $PERMISSIONS"
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else
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ERRORS=$((ERRORS+1))
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crit "$FILE permissions were not set to $PERMISSIONS"
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fi
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done
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if [ $ERRORS = 0 ]; then
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ok "SSH private keys in $DIR have correct permissions"
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fi
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ERRORS=0
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for FILE in $($SUDO_CMD find $DIR -xdev -type f -name 'ssh_host_*_key');
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do
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has_file_correct_ownership "$FILE" "$USER" "$GROUP"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE ownership was set to $USER:$GROUP"
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else
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ERRORS=$((ERRORS+1))
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crit "$FILE ownership was not set to $USER:$GROUP"
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fi
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done
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if [ $ERRORS = 0 ]; then
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ok "SSH private keys in $DIR have correct ownership"
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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for FILE in $($SUDO_CMD find $DIR -xdev -type f -name 'ssh_host_*_key');
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do
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has_file_correct_ownership "$FILE" "$USER" "$GROUP"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE ownership was set to $USER:$GROUP"
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else
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warn "fixing $DIR SSH private keys permissions to $USER:$GROUP"
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chown $USER:$GROUP $FILE
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fi
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done
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for FILE in $($SUDO_CMD find $DIR -xdev -type f -name 'ssh_host_*_key');
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do
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has_file_correct_permissions "$FILE" "$PERMISSIONS"
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if [ "$FNRET" = 0 ]; then
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ok "$FILE permissions were set to $PERMISSIONS"
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else
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warn "fixing $DIR SSH private keys ownership to $PERMISSIONS"
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chmod 0"$PERMISSIONS" "$FILE"
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fi
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done
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}
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# This function will check config parameters required
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check_config() {
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does_user_exist $USER
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if [ "$FNRET" != 0 ]; then
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crit "$USER does not exist"
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exit 128
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fi
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does_group_exist $GROUP
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if [ "$FNRET" != 0 ]; then
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crit "$GROUP does not exist"
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exit 128
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fi
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
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# shellcheck source=../../lib/main.sh
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. "$CIS_ROOT_DIR"/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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