mirror of
https://github.com/ovh/debian-cis.git
synced 2024-11-26 23:41:08 +01:00
80 lines
2.6 KiB
Bash
Executable File
80 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
#
|
|
# CIS Debian Hardening
|
|
#
|
|
|
|
#
|
|
# 12.11 Find SGID System Executables (Not Scored)
|
|
#
|
|
|
|
set -e # One error, it's over
|
|
set -u # One variable unset, it's over
|
|
|
|
# shellcheck disable=2034
|
|
HARDENING_LEVEL=2
|
|
DESCRIPTION="Find SGID system executables."
|
|
|
|
# This function will be called if the script status is on enabled / audit mode
|
|
audit () {
|
|
info "Checking if there are sgid files"
|
|
FS_NAMES=$(df --local -P | awk '{ if (NR!=1) print $6 }' )
|
|
# shellcheck disable=2086
|
|
FOUND_BINARIES=$( $SUDO_CMD find $FS_NAMES -xdev -type f -perm -2000 -print)
|
|
BAD_BINARIES=""
|
|
for BINARY in $FOUND_BINARIES; do
|
|
if grep -qw "$BINARY" <<< "$EXCEPTIONS"; then
|
|
debug "$BINARY is confirmed as an exception"
|
|
else
|
|
BAD_BINARIES="$BAD_BINARIES $BINARY"
|
|
fi
|
|
done
|
|
if [ ! -z "$BAD_BINARIES" ]; then
|
|
crit "Some sgid files are present"
|
|
FORMATTED_RESULT=$(sed "s/ /\n/g" <<< "$BAD_BINARIES" | sort | uniq | tr '\n' ' ')
|
|
crit "$FORMATTED_RESULT"
|
|
else
|
|
ok "No unknown sgid files found"
|
|
fi
|
|
}
|
|
|
|
# This function will be called if the script status is on enabled mode
|
|
apply () {
|
|
info "Removing sgid on valid binary may seriously harm your system, report only here"
|
|
}
|
|
|
|
# This function will create the config file for this check with default values
|
|
create_config() {
|
|
cat <<EOF
|
|
status=audit
|
|
# Put here valid binaries with sgid enabled separated by spaces
|
|
EXCEPTIONS="/sbin/unix_chkpwd /usr/sbin/unix_chkpwd /usr/bin/bsd-write /usr/bin/chage /usr/bin/crontab /usr/bin/expiry /usr/bin/mutt_dotlock /usr/bin/screen /usr/bin/ssh-agent /usr/bin/wall /usr/sbin/postdrop /usr/sbin/postqueue /usr/bin/at /usr/bin/dotlockfile /usr/bin/mail-lock /usr/bin/mail-touchlock /usr/bin/mail-unlock"
|
|
EOF
|
|
}
|
|
|
|
# This function will check config parameters required
|
|
check_config() {
|
|
if [ -z "$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
|