Nmap cassandra-brute NSE Script


This page contains detailed information about how to use the cassandra-brute NSE script. For list of all NSE scripts, visit the Nmap NSE Library.

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Overview
Error Messages

Script Overview


Script source code: https://github.com/nmap/nmap/tree/master/scripts/cassandra-brute.nse
Script categories: intrusive, brute
Target service / protocol: cassandra
Target network port(s): 9160
List of CVEs: -

Script Description


The cassandra-brute.nse script performs brute force password auditing against the Cassandra database.

For more information about Cassandra, see:

Cassandra-brute NSE Script Arguments


This is a full list of arguments supported by the cassandra-brute.nse script:

creds.global

Credentials 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

passdb

The filename of an alternate password database. Default: nselib/data/passwords.lst

unpwdb.passlimit

The maximum number of passwords passwords will return (default unlimited).

unpwdb.timelimit

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.

unpwdb.userlimit

The maximum number of usernames usernames will return (default unlimited).

userdb

The filename of an alternate username database. Default: nselib/data/usernames.lst

brute.credfile

A file containing username and password pairs delimited by '/'

brute.delay

The number of seconds to wait between guesses (default: 0)

brute.emptypass

Guess an empty password for each user (default: false)

brute.firstonly

Stop guessing after first password is found (default: false)

brute.guesses

The number of guesses to perform against each account. (default: 0 (unlimited)). The argument can be used to prevent account lockouts.

brute.mode

Can 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.

brute.passonly

Iterate over passwords only for services that provide only a password for authentication. (default: false)

brute.retries

The number of times to retry if recoverable failures occur. (default: 2)

brute.start

The number of threads the engine will start with. (default: 5).

brute.threads

The number of initial worker threads, the number of active threads will be automatically adjusted.

brute.unique

Make sure that each password is only guessed once (default: true)

brute.useraspass

Guess 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=cassandra-brute --script-args creds.global=value,creds.\[service]=value <target>

Cassandra-brute NSE Script Example Usage


Here's an example of how to use the cassandra-brute.nse script:

nmap -p 9160 <ip> --script=cassandra-brute

Cassandra-brute NSE Script Example Output


Here's a sample output from the cassandra-brute.nse script:

PORT     STATE SERVICE VERSION
9160/tcp open  apani1?
| cassandra-brute:
|   Accounts
|     admin:lover - Valid credentials
|   Statistics
|_    Performed 4581 guesses in 1 seconds, average tps: 4581

Cassandra-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


  • Vlatko Kosturjak

References


See Also


Related NSE scripts to the cassandra-brute.nse script:

Visit Nmap NSE Library for more scripts.

The cassandra-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.

couldn't send length:


Here is a relevant code snippet related to the "couldn't send length:" error message:

52:	    local loginstr = cassandra.loginstr (username, password)
53:	
54:	    local status, err = self.socket:send(string.pack(">I4", #loginstr))
55:	    local combo = username..":"..password
56:	    if ( not(status) ) then
57:	      local err = brute.Error:new( "couldn't send length:"..combo )
58:	      err:setAbort( true )
59:	      return false, err
60:	    end
61:	
62:	    status, err = self.socket:send(loginstr)

couldn't send login packet:


Here is a relevant code snippet related to the "couldn't send login packet: " error message:

59:	      return false, err
60:	    end
61:	
62:	    status, err = self.socket:send(loginstr)
63:	    if ( not(status) ) then
64:	      local err = brute.Error:new( "couldn't send login packet: "..combo )
65:	      err:setAbort( true )
66:	      return false, err
67:	    end
68:	
69:	    local status, response = self.socket:receive_bytes(22)

couldn't receive login reply size:


Here is a relevant code snippet related to the "couldn't receive login reply size: " error message:

66:	      return false, err
67:	    end
68:	
69:	    local status, response = self.socket:receive_bytes(22)
70:	    if ( not(status) ) then
71:	      local err = brute.Error:new( "couldn't receive login reply size: "..combo )
72:	      err:setAbort( true )
73:	      return false, err
74:	    end
75:	
76:	    local size = string.unpack(">I4", response, 1)

Incorrect password


Here is a relevant code snippet related to the "Incorrect password" error message:

80:	    if (magic == cassandra.LOGINSUCC) then
81:	      stdnse.debug3("Account SUCCESS: "..combo)
82:	      return true, creds.Account:new(username, password, creds.State.VALID)
83:	    elseif (magic == cassandra.LOGINFAIL) then
84:	      stdnse.debug3("Account FAIL: "..combo)
85:	      return false, brute.Error:new( "Incorrect password" )
86:	    elseif (magic == cassandra.LOGINACC) then
87:	      stdnse.debug3("Account VALID, but wrong password: "..combo)
88:	      return false, brute.Error:new( "Good user, bad password" )
89:	    else
90:	      stdnse.debug3("Unrecognized packet for "..combo)

Good user, bad password


Here is a relevant code snippet related to the "Good user, bad password" error message:

83:	    elseif (magic == cassandra.LOGINFAIL) then
84:	      stdnse.debug3("Account FAIL: "..combo)
85:	      return false, brute.Error:new( "Incorrect password" )
86:	    elseif (magic == cassandra.LOGINACC) then
87:	      stdnse.debug3("Account VALID, but wrong password: "..combo)
88:	      return false, brute.Error:new( "Good user, bad password" )
89:	    else
90:	      stdnse.debug3("Unrecognized packet for "..combo)
91:	      stdnse.debug3("packet hex: %s", stdnse.tohex(response) )
92:	      stdnse.debug3("size packet hex: %s", stdnse.tohex(size) )
93:	      stdnse.debug3("magic packet hex: %s", stdnse.tohex(magic) )

Version


This page has been created based on Nmap version 7.92.

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