mirror of
https://github.com/ovh/debian-cis.git
synced 2024-11-25 06:54:29 +01:00
86 lines
2.5 KiB
Bash
Executable File
86 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
|
||
# run-shellcheck
|
||
#
|
||
# CIS Debian Hardening
|
||
#
|
||
|
||
#
|
||
# 13.5 Verify No UID 0 Accounts Exist Other Than root (Scored)
|
||
#
|
||
|
||
set -e # One error, it's over
|
||
set -u # One variable unset, it's over
|
||
|
||
# shellcheck disable=2034
|
||
HARDENING_LEVEL=2
|
||
# shellcheck disable=2034
|
||
DESCRIPTION="Verify root is the only UID 0 account."
|
||
EXCEPTIONS=""
|
||
|
||
FILE='/etc/passwd'
|
||
RESULT=''
|
||
|
||
# This function will be called if the script status is on enabled / audit mode
|
||
audit () {
|
||
info "Checking if accounts have uid 0"
|
||
RESULT=$(awk -F: '($3 == 0 && $1!="root" ) { print $1 }' "$FILE" )
|
||
FOUND_EXCEPTIONS=""
|
||
for ACCOUNT in $RESULT; do
|
||
debug "Account : $ACCOUNT"
|
||
debug "Exceptions : $EXCEPTIONS"
|
||
debug "echo \"$EXCEPTIONS\" | grep -qw $ACCOUNT"
|
||
if echo "$EXCEPTIONS" | grep -qw "$ACCOUNT"; then
|
||
debug "$ACCOUNT is confirmed as an exception"
|
||
RESULT=$(sed "s!$ACCOUNT!!" <<< "$RESULT")
|
||
FOUND_EXCEPTIONS="$FOUND_EXCEPTIONS $ACCOUNT"
|
||
else
|
||
debug "$ACCOUNT not found in exceptions"
|
||
fi
|
||
done
|
||
if [ ! -z "$RESULT" ]; then
|
||
crit "Some accounts have uid 0: $(tr '\n' ' ' <<< "$RESULT")"
|
||
else
|
||
ok "No account with uid 0 appart from root ${FOUND_EXCEPTIONS:+and configured exceptions:}$FOUND_EXCEPTIONS"
|
||
fi
|
||
}
|
||
|
||
# This function will be called if the script status is on enabled mode
|
||
apply () {
|
||
info "Removing accounts with uid 0 may seriously harm your system, report only here"
|
||
}
|
||
|
||
# This function will create the config file for this check with default values
|
||
create_config() {
|
||
cat <<EOF
|
||
status=audit
|
||
# Put here valid accounts with uid 0 separated by spaces
|
||
EXCEPTIONS=""
|
||
EOF
|
||
}
|
||
|
||
# This function will check config parameters required
|
||
check_config() {
|
||
if [ -z "$EXCEPTIONS" ]; then
|
||
EXCEPTIONS="@"
|
||
fi
|
||
}
|
||
|
||
# Source Root Dir Parameter
|
||
if [ -r /etc/default/cis-hardening ]; then
|
||
. /etc/default/cis-hardening
|
||
fi
|
||
if [ -z "$CIS_ROOT_DIR" ]; then
|
||
echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
|
||
echo "Cannot source CIS_ROOT_DIR variable, aborting."
|
||
exit 128
|
||
fi
|
||
|
||
# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
|
||
if [ -r "$CIS_ROOT_DIR"/lib/main.sh ]; then
|
||
# shellcheck source=/opt/debian-cis/lib/main.sh
|
||
. "$CIS_ROOT_DIR"/lib/main.sh
|
||
else
|
||
echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
|
||
exit 128
|
||
fi
|