new upstream release (3.3.0); modify package compatibility for Stretch

[ossec-hids.git] / active-response / host-deny.sh

diff --git a/active-response/host-deny.sh b/active-response/host-deny.sh
index d29aa69..0893125 100755 (executable)
--- a/active-response/host-deny.sh
+++ b/active-response/host-deny.sh
@@ -33,7 +33,7 @@ lock()
         mkdir ${LOCK} > /dev/null 2>&1
         MSL=$?
         if [ "${MSL}" = "0" ]; then
-            # Lock aquired (setting the pid)
+            # Lock acquired (setting the pid)
             echo "$$" > ${LOCK_PID}
             return;
         fi
@@ -42,30 +42,27 @@ lock()
         C_PID=`cat ${LOCK_PID} 2>/dev/null`
         if [ "x" = "x${S_PID}" ]; then
             S_PID=${C_PID}
-        fi    
+        fi
 
         # Breaking out of the loop after X attempts
         if [ "x${C_PID}" = "x${S_PID}" ]; then
             i=`expr $i + 1`;
         fi
-   
-        # Sleep 1 after 10/25 interactions
-        if [ "$i" = "10" -o "$i" = "25" ]; then
-            sleep 1;
-        fi
-             
+
+        sleep $i;
+
         i=`expr $i + 1`;
-        
+
         # So i increments 2 by 2 if the pid does not change.
         # If the pid keeps changing, we will increments one
         # by one and fail after MAX_ITERACTION
         if [ "$i" = "${MAX_ITERATION}" ]; then
             echo "`date` Unable to execute. Locked: $0" \
                         >> ${PWD}/ossec-hids-responses.log
-            
+
             # Unlocking and exiting
             unlock;
-            exit 1;                
+            exit 1;
         fi
     done
 }
@@ -73,7 +70,7 @@ lock()
 # Unlock function
 unlock()
 {
-   rm -rf ${LOCK} 
+    rm -rf ${LOCK}
 }
 
 
@@ -83,13 +80,13 @@ echo "`date` $0 $1 $2 $3 $4 $5" >> ${PWD}/../logs/active-responses.log
 
 # IP Address must be provided
 if [ "x${IP}" = "x" ]; then
-   echo "$0: Missing argument <action> <user> (ip)" 
-   exit 1;
+    echo "$0: Missing argument <action> <user> (ip)"
+    exit 1;
 fi
 
 
-# Checking for invalid entries (lacking ".", etc)
-echo "${IP}" | grep "\." > /dev/null 2>&1
+# Checking for invalid entries (lacking "." or ":", etc)
+echo "${IP}" | egrep "\.|\:" > /dev/null 2>&1
 if [ ! $? = 0 ]; then
     echo "`date` Invalid ip/hostname entry: ${IP}" >> ${PWD}/../logs/active-responses.log
     exit 1;
@@ -98,39 +95,53 @@ fi
 
 # Adding the ip to hosts.deny
 if [ "x${ACTION}" = "xadd" ]; then
-   lock;     
-   if [ "X$UNAME" = "XFreeBSD" ]; then
-    echo "ALL : ${IP} : deny" >> /etc/hosts.allow
-   else    
-    echo "ALL:${IP}" >> /etc/hosts.deny
-   fi 
-   unlock;
-   exit 0;
-
-
-# Deleting from hosts.deny   
-elif [ "x${ACTION}" = "xdelete" ]; then   
-   lock;
-   TMP_FILE = `mktemp /var/ossec/ossec-hosts.XXXXXXXXXX` 
-   if [ "X${TMP_FILE}" = "X" ]; then 
-     # Cheap fake tmpfile, but should be harder then no random data 
-     TMP_FILE = "/var/ossec/ossec-hosts.`cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -1 `"
-   fi
-   if [ "X$UNAME" = "XFreeBSD" ]; then
-    cat /etc/hosts.allow | grep -v "ALL : ${IP} : deny$"> ${TMP_FILE}
-    mv ${TMP_FILE} /etc/hosts.allow
-   else
-    cat /etc/hosts.deny | grep -v "ALL:${IP}$"> ${TMP_FILE}
-    cat ${TMP_FILE} > /etc/hosts.deny
-    rm ${TMP_FILE}
-   fi 
-   unlock;
-   exit 0;
-
-
-# Invalid action   
+    # Looking for duplication
+    IPKEY=$(grep -w "${IP}" /etc/hosts.deny)
+    if [ ! -z "$IPKEY" ]; then
+        echo "IP ${IP} already exists on host.deny..." >> ${PWD}/../logs/active-responses.log
+        exit 1
+    fi
+    lock;
+    echo "${IP}" | grep "\:" > /dev/null 2>&1
+    if [ $? = 0 ]; then
+        IP="[${IP}]"
+    fi
+    if [ "X$UNAME" = "XFreeBSD" ]; then
+        echo "ALL : ${IP} : deny" >> /etc/hosts.allow
+    else
+        echo "ALL:${IP}" >> /etc/hosts.deny
+    fi
+    unlock;
+    exit 0;
+
+
+# Deleting from hosts.deny
+elif [ "x${ACTION}" = "xdelete" ]; then
+    lock;
+    TMP_FILE=`mktemp ${PWD}/ossec-hosts.XXXXXXXXXX`
+    if [ "X${TMP_FILE}" = "X" ]; then
+        # Cheap fake tmpfile, but should be harder then no random data
+        TMP_FILE="${PWD}/ossec-hosts.`cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -1 `"
+    fi
+    echo "${IP}" | grep "\:" > /dev/null 2>&1
+    if [ $? = 0 ]; then
+        IP="\[${IP}\]"
+    fi
+    if [ "X$UNAME" = "XFreeBSD" ]; then
+        cat /etc/hosts.allow | grep -v "ALL : ${IP} : deny$"> ${TMP_FILE}
+        mv ${TMP_FILE} /etc/hosts.allow
+    else
+        cat /etc/hosts.deny | grep -v "ALL:${IP}$"> ${TMP_FILE}
+        cat ${TMP_FILE} > /etc/hosts.deny
+        rm ${TMP_FILE}
+    fi
+    unlock;
+    exit 0;
+
+
+# Invalid action
 else
-   echo "$0: invalid action: ${ACTION}"
-fi       
+    echo "$0: invalid action: ${ACTION}"
+fi
 
 exit 1;