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https://github.com/ovh/debian-cis.git
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110 lines
3.4 KiB
Bash
Executable File
110 lines
3.4 KiB
Bash
Executable File
#!/bin/bash
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# run-shellcheck
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#
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# OVH Security audit
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#
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#
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# 99.1.3 Check there are no carte-blanche authorization in sudoers file(s).
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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=2
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# shellcheck disable=2034
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DESCRIPTION="Checks there are no carte-blanche authorization in sudoers file(s)."
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FILE="/etc/sudoers"
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DIRECTORY="/etc/sudoers.d"
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# spaces will be expanded to [[:space:]]* when using the regex
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# improves readability in audit report
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REGEX="ALL = \( ALL( : ALL)? \)( NOPASSWD:)? ALL"
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EXCEPT=""
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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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# expand spaces to [[:space:]]*
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# shellcheck disable=2001
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REGEX="$(echo "$REGEX" | sed 's/ /[[:space:]]*/g')"
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matched_files=""
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# check for pattern in $FILE
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if $SUDO_CMD grep -Eq "$REGEX" "$FILE"; then
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# Will log/warn below, once we've scanned everything,
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# because we must also check for patterns that are excused
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matched_files="$FILE"
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elif [ $? -gt 1 ]; then
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# ret > 1 means other grep error we must report
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crit "Couldn't grep for pattern in $FILE"
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else
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# no match, it's ok
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:
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fi
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# check for pattern in whole $DIRECTORY
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if $SUDO_CMD [ ! -d "$DIRECTORY" ]; then
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debug "$DIRECTORY does not exist"
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elif $SUDO_CMD [ ! -x "$DIRECTORY" ]; then
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crit "Cannot browse $DIRECTORY"
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else
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info "Will check for $($SUDO_CMD ls -f "$DIRECTORY" | wc -l) files within $DIRECTORY"
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matched_files="$matched_files $($SUDO_CMD grep -REl "$REGEX" "$DIRECTORY" || true)"
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fi
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# now check for pattern exceptions, and crit for each file otherwise
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for file in $matched_files; do
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RET=$($SUDO_CMD grep -E "$REGEX" "$file" | sed 's/\t/#/g;s/ /#/g')
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for line in $RET; do
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if grep -q "$(echo "$line" | cut -d '#' -f 1)" <<<"$EXCEPT"; then
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# shellcheck disable=2001
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ok "$(echo "$line" | sed 's/#/ /g') is present in $file but was EXCUSED because $(echo "$line" | cut -d '#' -f 1) is part of exceptions."
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continue
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fi
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# shellcheck disable=2001
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crit "$(echo "$line" | sed 's/#/ /g') is present in $file"
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done
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done
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}
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# This function will be called if the script status is on enabled mode
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apply() {
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:
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}
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# This function will create the config file for this check with default values
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create_config() {
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cat <<EOF
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status=audit
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# Put EXCEPTION account names here, space separated
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EXCEPT="root %root %sudo %wheel"
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EOF
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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# shellcheck source=../../debian/default
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. /etc/default/cis-hardening
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fi
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if [ -z "$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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