Test ID:	1.3.6.1.4.1.25623.1.0.104096
Category:	Nmap NSE net
Title:	Nmap NSE net: smb-flood
Summary:	Exhausts a remote SMB server's connection limit by by opening as many connections as we can. Most;implementations of SMB have a hard global limit of 11 connections for user accounts and 10;connections for anonymous. Once that limit is reached, further connections are denied. This script;exploits that limit by taking up all the connections and holding them.;;This works better with a valid user account, because Windows reserves one slot for valid users. So,;no matter how many anonymous connections are taking up spaces, a single valid user can still log in.;;This is *not* recommended as a general purpose script, because a) it is designed to harm the server;and has no useful output, and b) it never ends (until timeout).;;SYNTAX:;;smbbasic: Forces the authentication to use basic security, as opposed to 'extended security'.;Against most modern systems, extended security should work, but there may be cases;where you want to force basic. There's a chance that you'll get better results for;enumerating users if you turn on basic authentication.;;smbport: Override the default port choice. If 'smbport' is open, it's used. It's assumed;to be the same protocol as port 445, not port 139. Since it probably isn't possible to change;Windows' ports normally, this is mostly useful if you're bouncing through a relay or something.;;smbsign: Controls whether or not server signatures are checked in SMB packets. By default, on Windows,;server signatures aren't enabled or required. By default, this library will always sign;packets if it knows how, and will check signatures if the server says to. Possible values are:;; - 'force': Always check server signatures, even if server says it doesn't support them (will;probably fail, but is technically more secure).;; - 'negotiate': [default] Use signatures if server supports them.;; - 'ignore': Never check server signatures. Not recommended.;; - 'disable': Don't send signatures, at all, and don't check the server's. not recommended.;More information on signatures can be found in 'smbauth.lua'.;;randomseed: Set to a value to change the filenames/service names that are randomly generated.
Description:	Summary: Exhausts a remote SMB server's connection limit by by opening as many connections as we can. Most implementations of SMB have a hard global limit of 11 connections for user accounts and 10 connections for anonymous. Once that limit is reached, further connections are denied. This script exploits that limit by taking up all the connections and holding them. This works better with a valid user account, because Windows reserves one slot for valid users. So, no matter how many anonymous connections are taking up spaces, a single valid user can still log in. This is *not* recommended as a general purpose script, because a) it is designed to harm the server and has no useful output, and b) it never ends (until timeout). SYNTAX: smbbasic: Forces the authentication to use basic security, as opposed to 'extended security'. Against most modern systems, extended security should work, but there may be cases where you want to force basic. There's a chance that you'll get better results for enumerating users if you turn on basic authentication. smbport: Override the default port choice. If 'smbport' is open, it's used. It's assumed to be the same protocol as port 445, not port 139. Since it probably isn't possible to change Windows' ports normally, this is mostly useful if you're bouncing through a relay or something. smbsign: Controls whether or not server signatures are checked in SMB packets. By default, on Windows, server signatures aren't enabled or required. By default, this library will always sign packets if it knows how, and will check signatures if the server says to. Possible values are: - 'force': Always check server signatures, even if server says it doesn't support them (will probably fail, but is technically more secure). - 'negotiate': [default] Use signatures if server supports them. - 'ignore': Never check server signatures. Not recommended. - 'disable': Don't send signatures, at all, and don't check the server's. not recommended. More information on signatures can be found in 'smbauth.lua'. randomseed: Set to a value to change the filenames/service names that are randomly generated. CVSS Score: 9.3 CVSS Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Copyright	Copyright (C) 2011 NSE-Script: The Nmap Security Scanner; NASL-Wrapper: Greenbone Networks GmbH

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