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89 lines
2.7 KiB
Bash
Executable File
89 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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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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HARDENING_LEVEL=1
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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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OPTIONS=(-xdev -type f -name "ssh_host_*_key")
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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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have_files_in_dir_correct_ownership $DIR $USER $GROUP OPTIONS
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if [ $FNRET = 0 ]; then
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ok "SSH public keys in $DIR have correct ownership"
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else
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crit "Some $DIR SSH public keys ownership were not set to $USER:$GROUP"
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fi
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have_files_in_dir_correct_permissions $DIR $PERMISSIONS OPTIONS
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if [ $FNRET = 0 ]; then
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ok "SSH public keys in $DIR have correct permissions"
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else
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crit "Some $DIR SSH public keys permissions were not set to $PERMISSIONS"
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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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have_files_in_dir_correct_ownership $DIR $USER $GROUP OPTIONS
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if [ $FNRET = 0 ]; then
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ok "SSH public keys in $DIR have correct ownership"
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else
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warn "fixing $DIR SSH public keys ownership to $USER:$GROUP"
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find /etc/ssh -xdev -type f -name 'ssh_host_*_key.pub' -exec chown root:root {} \;
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fi
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have_files_in_dir_correct_permissions $DIR $PERMISSIONS OPTIONS
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if [ $FNRET = 0 ]; then
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ok "SSH public keys in $DIR have correct permissions"
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else
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info "fixing $DIR SSH public keys permissions to $PERMISSIONS"
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find /etc/ssh -xdev -type f -name 'ssh_host_*_key.pub' -exec chmod 0600 {} \;
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fi
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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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. /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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. $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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