Nmap irc-sasl-brute NSE Script
This page contains detailed information about how to use the irc-sasl-brute NSE script. For list of all NSE scripts, visit the Nmap NSE Library.
Select: |
---|
Script Overview
Script source code: https://github.com/nmap/nmap/tree/master/scripts/irc-sasl-brute.nse
Script categories: brute, intrusive
Target service / protocol: irc
Target network port(s): 6664, 6665, 6666, 6667, 6668, 6669, 6679, 6697, 7000, 8067
List of CVEs: -
Script Description
The irc-sasl-brute.nse script performs brute force password auditing against IRC (Internet Relay Chat) servers supporting SASL authentication.
Irc-sasl-brute NSE Script Arguments
This is a full list of arguments supported by the irc-sasl-brute.nse script:
irc-sasl-brute.threadsThe number of threads to use while brute-forcing. Defaults to 2.
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
smbdomainThe domain to log in with. If you aren't in a domain environment, then anything will (should?) be accepted by the server.
smbhashA password hash to use when logging in. This is given as a single hex string (32 characters) or a pair of hex strings (both 32 characters, optionally separated by a single character). These hashes are the LanMan or NTLM hash of the user's password, and are stored on disk or in memory. They can be retrieved from memory using the fgdump or pwdump tools.
smbnoguestUse to disable usage of the 'guest' account.
smbpasswordThe password to connect with. Be cautious with this, since some servers will lock accounts if the incorrect password is given. Although it's rare that the Administrator account can be locked out, in the off chance that it can, you could get yourself in trouble. To use a blank password, leave this parameter off altogether.
smbtypeThe type of SMB authentication to use. These are the possible options:
v1
: Sends LMv1 and NTLMv1.LMv1
: Sends LMv1 only.NTLMv1
: Sends NTLMv1 only (default).v2
: Sends LMv2 and NTLMv2.LMv2
: Sends LMv2 only.NTLMv2
: Doesn't exist; the protocol doesn't support NTLMv2 alone. The default,NTLMv1
, is a pretty decent compromise between security and compatibility. If you are paranoid, you might want to usev2
orlmv2
for this. (Actually, if you're paranoid, you should be avoiding this protocol altogether!). If you're using an extremely old system, you might need to set this tov1
orlm
, which are less secure but more compatible. For information, seesmbauth.lua
.
The SMB username to log in with. The forms "DOMAIN\username" and "username@DOMAIN" are not understood. To set a domain, use the smbdomain
argument.
- - -
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=irc-sasl-brute --script-args irc-sasl-brute.threads=value,creds.global=value <target>
Irc-sasl-brute NSE Script Example Usage
Here's an example of how to use the irc-sasl-brute.nse script:
nmap --script irc-sasl-brute -p 6667 <ip>
Irc-sasl-brute NSE Script Example Output
Here's a sample output from the irc-sasl-brute.nse script:
PORT STATE SERVICE REASON
6667/tcp open irc syn-ack
| irc-sasl-brute:
| Accounts
| root:toor - Valid credentials
| Statistics
|_ Performed 60 guesses in 29 seconds, average tps: 2
Irc-sasl-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
- Piotr Olma
References
- https://nmap.org/nsedoc/scripts/irc-sasl-brute.html
- https://github.com/nmap/nmap/tree/master/scripts/irc-sasl-brute.nse
- https://github.com/atheme/charybdis/blob/master/doc/sasl.txt
- http://www.leeh.co.uk/draft-mitchell-irc-capabilities-02.html
See Also
Related NSE scripts to the irc-sasl-brute.nse script:
Visit Nmap NSE Library for more scripts.
The irc-sasl-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.
Failed to connect to server
Here is a relevant code snippet related to the "Failed to connect to server" error message:
59: local s, r, opts, _ = comm.tryssl(self.host,
60: self.port,
61: "CAP REQ sasl\r\n",
62: { timeout = 10000 } )
63: if ( not(s) ) then
64: return false, "Failed to connect to server"
65: end
66: if string.find(r:lower(), "throttled") then
67: -- we were reconnecting too fast
68: dbg(2, "throttled.")
69: return false, "We got throttled."
We got throttled.
Here is a relevant code snippet related to the "We got throttled." error message:
64: return false, "Failed to connect to server"
65: end
66: if string.find(r:lower(), "throttled") then
67: -- we were reconnecting too fast
68: dbg(2, "throttled.")
69: return false, "We got throttled."
70: end
71: local status, _ = s:send("CAP END\r\n")
72: if not status then return false, "Send failed." end
73: local response
74: repeat
Send failed.
Here is a relevant code snippet related to the "Send failed." error message:
67: -- we were reconnecting too fast
68: dbg(2, "throttled.")
69: return false, "We got throttled."
70: end
71: local status, _ = s:send("CAP END\r\n")
72: if not status then return false, "Send failed." end
73: local response
74: repeat
75: status, response = s:receive_lines(1)
76: if not status then return false, "Receive failed." end
77: if string.find(response, "ACK") then status = false end
Receive failed.
Here is a relevant code snippet related to the "Receive failed." error message:
71: local status, _ = s:send("CAP END\r\n")
72: if not status then return false, "Send failed." end
73: local response
74: repeat
75: status, response = s:receive_lines(1)
76: if not status then return false, "Receive failed." end
77: if string.find(response, "ACK") then status = false end
78: until (not status)
79: self.socket = s
80: return true
81: end,
Incorrect username or password
Here is a relevant code snippet related to the "Incorrect username or password" error message:
123: until (not status)
124:
125: if (success) then
126: return true, creds.Account:new(username, password, creds.State.VALID)
127: end
128: return false, brute.Error:new("Incorrect username or password")
129: end,
130:
131: disconnect = function(self) return self.socket:close() end,
132: }
133:
Server doesn't support SASL authentication.
Here is a relevant code snippet related to the "Server doesn't support SASL authentication." error message:
173: end
174:
175: action = function(host, port)
176: local sasl_supported, mechs = check_sasl(host, port)
177: if not sasl_supported then
178: return stdnse.format_output(false, "Server doesn't support SASL authentication.")
179: end
180:
181: local saslencoder = sasl.Helper:new()
182: local sasl_mech
183:
Version
This page has been created based on Nmap version 7.92.
Go back to menu.