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Nmap NSE Scripts

The following scripts are available in official Nmap repositories:

  • ip-https-discover.nse
  • knx-gateway-discover.nse
  • knx-gateway-info.nse
  • sstp-discover.nse

knx-gateway-info.nse

This script establishes a unicast connection to a specific device in order to retrieve information. This can be used to e.g. retrieve gateways information over the Internet.

Usage

# nmap -sU -p3671 --script ./knx-gateway-info.nse 192.168.178.11

Note: Increase verbosity/debug to see full message contents:

# nmap -sU -p3671 -d --script ./knx-gateway-info.nse 192.168.178.11

Sample Output

# nmap -sU -p3671 --script ./knx-gateway-info.nse 192.168.178.11

Starting Nmap 6.49SVN ( https://nmap.org ) at 2015-08-12 20:21 CEST
Nmap scan report for 192.168.178.11
Host is up (0.00042s latency).
PORT     STATE         SERVICE
3671/udp open|filtered efcp
| knx-gateway-info:
|   Body:
|     DIB_DEV_INFO:
|       KNX address: 15.15.255
|       Decive serial: 00ef2650065c
|       Multicast address: 0.0.0.0
|       Device friendly name: IP-Viewer
|     DIB_SUPP_SVC_FAMILIES:
|       KNXnet/IP Core version 1
|       KNXnet/IP Device Management version 1
|       KNXnet/IP Tunnelling version 1
|_      KNXnet/IP Object Server version 1

knx-gateway-discover.nse

This script uses a multicast packet to discover all local gateways. According to the KNX specification every device must support this. This script can only be used to discover local KNX gateways.

Usage

# nmap -e eth0 --script ./knx-gateway-discover.nse

Note: Increase verbosity/debug to see full message contents:

# nmap -e eth0 -v -d --script ./knx-gateway-discover.nse

The script supports the following script-args:

  • timeout: Defines how long the script waits for responses
  • newtargets: Add found gateways to target list

Sample Output

Default

# nmap -e eth0 --script ./knx-gateway-discover.nse

Starting Nmap 6.49SVN ( https://nmap.org ) at 2015-08-12 20:19 CEST
Pre-scan script results:
| knx-gateway-discover:
|   192.168.178.11:
|     Body:
|       HPAI:
|         Port: 3671
|       DIB_DEV_INFO:
|         KNX address: 15.15.255
|         Decive serial: 00ef2650065c
|         Multicast address: 0.0.0.0
|         Device MAC address: 00:05:26:50:06:5c
|         Device friendly name: IP-Viewer
|       DIB_SUPP_SVC_FAMILIES:
|         KNXnet/IP Core version 1
|         KNXnet/IP Device Management version 1
|         KNXnet/IP Tunnelling version 1
|_        KNXnet/IP Object Server version 1

Debug

# nmap -d -e eth0 --script ./knx-gateway-discover.nse

Starting Nmap 6.49SVN ( https://nmap.org ) at 2015-08-12 20:20 CEST
PORTS: Using top 1000 ports found open (TCP:1000, UDP:0, SCTP:0)
--------------- Timing report ---------------
  hostgroups: min 1, max 100000
  rtt-timeouts: init 1000, min 100, max 10000
  max-scan-delay: TCP 1000, UDP 1000, SCTP 1000
  parallelism: min 0, max 0
  max-retries: 10, host-timeout: 0
  min-rate: 0, max-rate: 0
---------------------------------------------
NSE: Using Lua 5.2.
NSE: Arguments from CLI:
NSE: Loaded 1 scripts for scanning.
NSE: Script Pre-scanning.
NSE: Starting runlevel 1 (of 1) scan.
Initiating NSE at 20:20
NSE: Starting knx-gateway-discover.
NSE: Finished knx-gateway-discover.
NSE: Finished knx-gateway-discover.
NSE: Finished knx-gateway-discover.
Completed NSE at 20:20, 3.08s elapsed
Pre-scan script results:
| knx-gateway-discover:
|   192.168.178.11:
|     Header:
|       Header length: 6
|       Protocol version: 16
|       Service type: SEARCH_RESPONSE (0x0202)
|       Total length: 78
|     Body:
|       HPAI:
|         Protocol code: 01
|         IP address: 192.168.178.11
|         Port: 3671
|       DIB_DEV_INFO:
|         Description type: Device Information
|         KNX medium: KNX TP1
|         Device status: 00
|         KNX address: 15.15.255
|         Project installation identifier: 0000
|         Decive serial: 00ef2650065c
|         Multicast address: 0.0.0.0
|         Device MAC address: 00:05:26:50:06:5c
|         Device friendly name: IP-Viewer
|       DIB_SUPP_SVC_FAMILIES:
|         KNXnet/IP Core version 1
|         KNXnet/IP Device Management version 1
|         KNXnet/IP Tunnelling version 1
|_        KNXnet/IP Object Server version 1

mop-discover.nse

Check if the Maintenance Operation Protocol (MOP) is enabled on Cisco devices. Please refer to this post for further information.

Checking if a device supports MOP is as easy as this:

nmap --script mop-discover.nse 192.168.1.1

In case there is just layer 2 connectivity, the MAC address can be specified as follows:

nmap --script mop-discover.nse --script-args target=01:02:03:04:05:06 -e eth0

Note: This might requires to set an IP address on the defined interface or else Nmap won't be able to use it. However, any IP will do.

ssl-heartbleed-dump.nse

Discovers/Exploits Heartbleed (CVE-2014-0160). This script is basically like the Heartbleed detection script included in official Nmap repositories with the ability to dump the leaked memory to an outfile or print a hexdump by increasing Nmap's debug output.

Check if a host is vulnerable to Heartbleed (checks every SSL-enabled HTTP, FTP, SMTP and/or XMPP port):

$ nmap --script ./ssl-heartbleed-dump.nse 192.168.1.1

Print out a hexdump of leaked memory by increasing Nmap's debug level with the -d flag:

$ nmap -d --script=./ssl-heartbleed-dump.nse 192.168.1.1

Dump leaked memory into an outfile:

$ nmap --script ./ssl-heartbleed-dump.nse --script-args 'ssl-heartbleed-dump.dumpfile=/tmp/heartbleed.dump' 192.168.1.1

Run ssl-heartbleed-dump.nse against every open port, regardless if the servie was detected or not:

$ nmap --script +./ssl-heartbleed-dump.nse 192.168.1.1