12.11_find_sgid_files.sh

bin/hardening/12.11_find_sgid_files.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+#
+
+#
+# 12.11 Find SGID System Executables (Not Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    info "Checking if there is sgid files"
+    RESULT=$(df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -type f -perm -2000 -print)
+    for BINARY in $RESULT; do
+        if grep -q $BINARY <<< "$EXCEPTIONS"; then
+            debug "$BINARY is confirmed as an exception"
+            RESULT=$(sed "s!$BINARY!!" <<< $RESULT)
+        fi
+    done
+    if [ ! -z "$RESULT" ]; then
+        crit "Some sgid files are present"
+        FORMATTED_RESULT=$(sed "s/ /\n/g" <<< $RESULT | sort | uniq | tr '\n' ' ')
+        crit "$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 check config parameters required
+check_config() {
+    if [ -z "$EXCEPTIONS" ]; then
+        EXCEPTIONS="@"
+    fi
+}
+
+# Source Root Dir Parameter
+if [ ! -r /etc/default/cis-hardenning ]; then
+    echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting"
+    exit 128
+else
+    . /etc/default/cis-hardenning
+    if [ -z $CIS_ROOT_DIR ]; then
+        echo "No CIS_ROOT_DIR variable, aborting"
+    fi
+fi 
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh