Nmap iscsi-brute NSE Script
This page contains detailed information about how to use the iscsi-brute NSE script. For list of all NSE scripts, visit the Nmap NSE Library.
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Script Overview
Script source code: https://github.com/nmap/nmap/tree/master/scripts/iscsi-brute.nse
Script categories: intrusive, brute
Target service / protocol: tcp
Target network port(s): 3260
List of CVEs: -
Script Description
The iscsi-brute.nse script performs brute force password auditing against iSCSI targets.
Iscsi-brute NSE Script Arguments
This is a full list of arguments supported by the iscsi-brute.nse script:
iscsi-brute.targetISCSI target to brute-force.
creds.globalCredentials to be returned by Credentials.getCredentials regardless of the service.
creds.[service]Credentials to be returned by Credentials.getCredentials for [service]. E.g. creds.http=admin:password
passdbThe filename of an alternate password database. Default: nselib/data/passwords.lst
unpwdb.passlimit
The maximum number of passwords passwords
will return (default unlimited).
The maximum amount of time that any iterator will run before stopping. The value is in seconds by default and you can follow it with ms
, s
, m
, or h
for milliseconds, seconds, minutes, or hours. For example, unpwdb.timelimit=30m
or unpwdb.timelimit=.5h
for 30 minutes. The default depends on the timing template level (see the module description). Use the value 0
to disable the time limit.
The maximum number of usernames usernames
will return (default unlimited).
The filename of an alternate username database. Default: nselib/data/usernames.lst
brute.credfileA file containing username and password pairs delimited by '/'
brute.delayThe number of seconds to wait between guesses (default: 0)
brute.emptypassGuess an empty password for each user (default: false)
brute.firstonlyStop guessing after first password is found (default: false)
brute.guessesThe number of guesses to perform against each account. (default: 0 (unlimited)). The argument can be used to prevent account lockouts.
brute.modeCan be user, pass or creds and determines what mode to run the engine in.
- user - the unpwdb library is used to guess passwords, every password Password is tried for each user. (The user iterator is in the outer loop)
- pass - the unpwdb library is used to guess passwords, each password Is tried for every user. (The password iterator is in the outer loop)
- creds - a set of credentials (username and password pairs) are Guessed against the service. This allows for lists of known or common username and password combinations to be tested. If no mode is specified and the script has not added any custom iterator the pass mode will be enabled.
Iterate over passwords only for services that provide only a password for authentication. (default: false)
brute.retriesThe number of times to retry if recoverable failures occur. (default: 2)
brute.startThe number of threads the engine will start with. (default: 5).
brute.threadsThe number of initial worker threads, the number of active threads will be automatically adjusted.
brute.uniqueMake sure that each password is only guessed once (default: true)
brute.useraspassGuess the username as password for each user (default: true)
creds.[service]Credentials to be returned by Credentials.getCredentials for [service]. E.g. creds.http=admin:password
- - -
To use these script arguments, add them to the Nmap command line using the --script-args arg1=value,[arg2=value,..]
syntax. For example:
nmap --script=iscsi-brute --script-args iscsi-brute.target=value,creds.global=value <target>
Iscsi-brute NSE Script Example Usage
Here's an example of how to use the iscsi-brute.nse script:
nmap --script=iscsi-brute <target>
Iscsi-brute NSE Script Example Output
Here's a sample output from the iscsi-brute.nse script:
PORT STATE SERVICE
3260/tcp open iscsi syn-ack
| iscsi-brute:
| Accounts
| user:password123456 => Valid credentials
| Statistics
|_ Perfomed 5000 guesses in 7 seconds, average tps: 714
Iscsi-brute NSE Script Example XML Output
There is no sample XML output for this module. However, by providing the -oX <file>
option, Nmap will produce a XML output and save it in the file.xml
file.
Author
- Patrik Karlsson
References
- https://nmap.org/nsedoc/scripts/iscsi-brute.html
- https://github.com/nmap/nmap/tree/master/scripts/iscsi-brute.nse
See Also
Related NSE scripts to the iscsi-brute.nse script:
Visit Nmap NSE Library for more scripts.
The iscsi-brute.nse script may fail with the following error messages. Check for the possible causes by using the code snippets highlighted below found in the script source code. This can often times help in identifying the root cause of the problem.
Incorrect password
Here is a relevant code snippet related to the "Incorrect password" error message:
52:
53: if ( status ) then
54: return true, creds.Account:new(username, password, creds.State.VALID)
55: end
56:
57: return false, brute.Error:new( "Incorrect password" )
58: end,
59:
60: disconnect = function( self )
61: self.helper:close()
62: end,
No target specified (see iscsi-brute.target)
Here is a relevant code snippet related to the "No target specified (see iscsi-brute.target)" error message:
65:
66: action = function( host, port )
67:
68: local target = stdnse.get_script_args('iscsi-brute.target')
69: if ( not(target) ) then
70: return stdnse.format_output(false, "No target specified (see iscsi-brute.target)")
71: end
72:
73: local helper = iscsi.Helper:new( host, port )
74: local status, err = helper:connect()
75: if ( not(status) ) then return false, "Failed to connect" end
Failed to connect
Here is a relevant code snippet related to the "Failed to connect" error message:
70: return stdnse.format_output(false, "No target specified (see iscsi-brute.target)")
71: end
72:
73: local helper = iscsi.Helper:new( host, port )
74: local status, err = helper:connect()
75: if ( not(status) ) then return false, "Failed to connect" end
76:
77: local response
78: status, response = helper:login( target )
79: helper:logout()
80: helper:close()
Version
This page has been created based on Nmap version 7.92.
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