Microsoft SQL Server SUSER_SNAME SQL Logins Enumeration - Metasploit
This page contains detailed information about how to use the auxiliary/admin/mssql/mssql_enum_sql_logins metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.
Module Overview
Name: Microsoft SQL Server SUSER_SNAME SQL Logins Enumeration
Module: auxiliary/admin/mssql/mssql_enum_sql_logins
Source code: modules/auxiliary/admin/mssql/mssql_enum_sql_logins.rb
Disclosure date: -
Last modification time: 2020-09-22 02:56:51 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: ms-sql2000, ms-sql-s, sybase
Target network port(s): 1433, 1434, 1435, 2533, 2638, 9152, 14330
List of CVEs: -
This module can be used to obtain a list of all logins from a SQL Server with any login. Selecting all of the logins from the master..syslogins table is restricted to sysadmins. However, logins with the PUBLIC role (everyone) can quickly enumerate all SQL Server logins using the SUSER_SNAME function by fuzzing the principal_id parameter. This is pretty simple, because the principal IDs assigned to logins are incremental. Once logins have been enumerated they can be verified via sp_defaultdb error analysis. This is important, because not all of the principal IDs resolve to SQL logins (some resolve to roles instead). Once logins have been enumerated, they can be used in dictionary attacks.
Module Ranking and Traits
Module Ranking:
- normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.
Basic Usage
msf > use auxiliary/admin/mssql/mssql_enum_sql_logins
msf auxiliary(mssql_enum_sql_logins) > show targets
... a list of targets ...
msf auxiliary(mssql_enum_sql_logins) > set TARGET target-id
msf auxiliary(mssql_enum_sql_logins) > show options
... show and set options ...
msf auxiliary(mssql_enum_sql_logins) > exploit
Required Options
- RHOSTS: The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
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Msfconsole Usage
Here is how the admin/mssql/mssql_enum_sql_logins auxiliary module looks in the msfconsole:
msf6 > use auxiliary/admin/mssql/mssql_enum_sql_logins
msf6 auxiliary(admin/mssql/mssql_enum_sql_logins) > show info
Name: Microsoft SQL Server SUSER_SNAME SQL Logins Enumeration
Module: auxiliary/admin/mssql/mssql_enum_sql_logins
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
nullbind <[email protected]>
Check supported:
No
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
FuzzNum 300 yes Number of principal_ids to fuzz.
PASSWORD no The password for the specified username
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 1433 yes The target port (TCP)
TDSENCRYPTION false yes Use TLS/SSL for TDS data "Force Encryption"
USERNAME sa no The username to authenticate as
USE_WINDOWS_AUTHENT false yes Use windows authentification (requires DOMAIN option set)
Description:
This module can be used to obtain a list of all logins from a SQL
Server with any login. Selecting all of the logins from the
master..syslogins table is restricted to sysadmins. However, logins
with the PUBLIC role (everyone) can quickly enumerate all SQL Server
logins using the SUSER_SNAME function by fuzzing the principal_id
parameter. This is pretty simple, because the principal IDs assigned
to logins are incremental. Once logins have been enumerated they can
be verified via sp_defaultdb error analysis. This is important,
because not all of the principal IDs resolve to SQL logins (some
resolve to roles instead). Once logins have been enumerated, they
can be used in dictionary attacks.
References:
http://msdn.microsoft.com/en-us/library/ms174427.aspx
Module Options
This is a complete list of options available in the admin/mssql/mssql_enum_sql_logins auxiliary module:
msf6 auxiliary(admin/mssql/mssql_enum_sql_logins) > show options
Module options (auxiliary/admin/mssql/mssql_enum_sql_logins):
Name Current Setting Required Description
---- --------------- -------- -----------
FuzzNum 300 yes Number of principal_ids to fuzz.
PASSWORD no The password for the specified username
RHOSTS yes The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
RPORT 1433 yes The target port (TCP)
TDSENCRYPTION false yes Use TLS/SSL for TDS data "Force Encryption"
USERNAME sa no The username to authenticate as
USE_WINDOWS_AUTHENT false yes Use windows authentification (requires DOMAIN option set)
Advanced Options
Here is a complete list of advanced options supported by the admin/mssql/mssql_enum_sql_logins auxiliary module:
msf6 auxiliary(admin/mssql/mssql_enum_sql_logins) > show advanced
Module advanced options (auxiliary/admin/mssql/mssql_enum_sql_logins):
Name Current Setting Required Description
---- --------------- -------- -----------
CHOST no The local client address
CPORT no The local client port
ConnectTimeout 10 yes Maximum number of seconds to establish a TCP connection
DOMAIN WORKSTATION yes The domain to use for windows authentication
HEX2BINARY /opt/metasploit-framework/embedded/framework/data/exploits/mssql/h2b no The path to the hex2binary script on the disk
NTLM::SendLM true yes Always send the LANMAN response (except when NTLMv2_session is specified)
NTLM::SendNTLM true yes Activate the 'Negotiate NTLM key' flag, indicating the use of NTLM responses
NTLM::SendSPN true yes Send an avp of type SPN in the ntlmv2 client blob, this allows authentication on Windows 7+/Server 2008 R2+ when SPN is required
NTLM::UseLMKey false yes Activate the 'Negotiate Lan Manager Key' flag, using the LM key when the LM response is sent
NTLM::UseNTLM2_session true yes Activate the 'Negotiate NTLM2 key' flag, forcing the use of a NTLMv2_session
NTLM::UseNTLMv2 true yes Use NTLMv2 instead of NTLM2_session when 'Negotiate NTLM2' key is true
Proxies no A proxy chain of format type:host:port[,type:host:port][...]
SSL false no Negotiate SSL/TLS for outgoing connections
SSLCipher no String for SSL cipher - "DHE-RSA-AES256-SHA" or "ADH"
SSLVerifyMode PEER no SSL verification method (Accepted: CLIENT_ONCE, FAIL_IF_NO_PEER_CERT, NONE, PEER)
SSLVersion Auto yes Specify the version of SSL/TLS to be used (Auto, TLS and SSL23 are auto-negotiate) (Accepted: Auto, TLS, SSL23, SSL3, TLS1, TLS1.1, TLS1
.2)
VERBOSE false no Enable detailed status messages
WORKSPACE no Specify the workspace for this module
Auxiliary Actions
This is a list of all auxiliary actions that the admin/mssql/mssql_enum_sql_logins module can do:
msf6 auxiliary(admin/mssql/mssql_enum_sql_logins) > show actions
Auxiliary actions:
Name Description
---- -----------
Evasion Options
Here is the full list of possible evasion options supported by the admin/mssql/mssql_enum_sql_logins auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):
msf6 auxiliary(admin/mssql/mssql_enum_sql_logins) > show evasion
Module evasion options:
Name Current Setting Required Description
---- --------------- -------- -----------
TCP::max_send_size 0 no Maxiumum tcp segment size. (0 = disable)
TCP::send_delay 0 no Delays inserted before every send. (0 = disable)
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Error Messages
This module may fail with the following error messages:
Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.
Login was unsuccessful. Check your credentials.
Here is a relevant code snippet related to the "Login was unsuccessful. Check your credentials." error message:
35: # Check connection and issue initial query
36: print_status("Attempting to connect to the database server at #{rhost}:#{rport} as #{datastore['USERNAME']}...")
37: if mssql_login_datastore
38: print_good('Connected.')
39: else
40: print_error('Login was unsuccessful. Check your credentials.')
41: disconnect
42: return
43: end
44:
45: # Query for sysadmin status
<USERNAME> is NOT a sysadmin.
Here is a relevant code snippet related to the "<USERNAME> is NOT a sysadmin." error message:
48:
49: # Check if user has sysadmin role
50: if user_status == 1
51: print_good("#{datastore['USERNAME']} is a sysadmin.")
52: else
53: print_status("#{datastore['USERNAME']} is NOT a sysadmin.")
54: end
55:
56: # Get a list if sql server logins using SUSER_NAME()
57: print_status("Setup to fuzz #{datastore['FuzzNum']} SQL Server logins.")
58: print_status('Enumerating logins...')
Sorry, somethings went wrong - SQL Server logins were found.
Here is a relevant code snippet related to the "Sorry, somethings went wrong - SQL Server logins were found." error message:
56: # Get a list if sql server logins using SUSER_NAME()
57: print_status("Setup to fuzz #{datastore['FuzzNum']} SQL Server logins.")
58: print_status('Enumerating logins...')
59: sql_logins_list = get_sql_logins
60: if sql_logins_list.nil? || sql_logins_list.empty?
61: print_error('Sorry, somethings went wrong - SQL Server logins were found.')
62: disconnect
63: return
64: else
65: # Print number of initial logins found
66: print_good("#{sql_logins_list.length} initial SQL Server logins were found.")
Sorry, no SQL Server logins could be verified.
Here is a relevant code snippet related to the "Sorry, no SQL Server logins could be verified." error message:
74:
75: # Verify the enumerated SQL Logins using sp_defaultdb error ananlysis
76: print_status('Verifying the SQL Server logins...')
77: sql_logins_list_verified = verify_logins(sql_logins_list)
78: if sql_logins_list_verified.nil?
79: print_error('Sorry, no SQL Server logins could be verified.')
80: disconnect
81: return
82: else
83:
84: # Display list verified SQL Server logins
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Related Pull Requests
- #14202 Merged Pull Request: Implement the zeitwerk autoloader within lib/msf/core
- #8716 Merged Pull Request: Print_Status -> Print_Good (And OCD bits 'n bobs)
- #8338 Merged Pull Request: Fix msf/core and self.class msftidy warnings
- #6655 Merged Pull Request: use MetasploitModule as a class name
- #6648 Merged Pull Request: Change metasploit class names
- #4201 Merged Pull Request: Minor typos and grammar fixes (release fixup)
- #4168 Merged Pull Request: Added mssql_enum_sql_logins module
References
See Also
Check also the following modules related to this module:
- auxiliary/admin/mssql/mssql_enum
- auxiliary/admin/mssql/mssql_enum_domain_accounts
- auxiliary/admin/mssql/mssql_escalate_dbowner
- auxiliary/admin/mssql/mssql_escalate_dbowner_sqli
- auxiliary/admin/mssql/mssql_escalate_execute_as
- auxiliary/admin/mssql/mssql_escalate_execute_as_sqli
- auxiliary/admin/mssql/mssql_exec
- auxiliary/admin/mssql/mssql_findandsampledata
- auxiliary/admin/mssql/mssql_idf
- auxiliary/admin/mssql/mssql_ntlm_stealer
- auxiliary/admin/mssql/mssql_ntlm_stealer_sqli
- auxiliary/admin/mssql/mssql_sql
- auxiliary/admin/mssql/mssql_sql_file
- auxiliary/scanner/mssql/mssql_hashdump
- auxiliary/scanner/mssql/mssql_login
- auxiliary/scanner/mssql/mssql_ping
- auxiliary/scanner/mssql/mssql_schemadump
- auxiliary/server/capture/mssql
- exploit/windows/mssql/lyris_listmanager_weak_pass
- exploit/windows/mssql/ms02_039_slammer
- exploit/windows/mssql/ms02_056_hello
- exploit/windows/mssql/ms09_004_sp_replwritetovarbin
- exploit/windows/mssql/ms09_004_sp_replwritetovarbin_sqli
- exploit/windows/mssql/mssql_clr_payload
- exploit/windows/mssql/mssql_linkcrawler
- exploit/windows/mssql/mssql_payload
- exploit/windows/mssql/mssql_payload_sqli
- post/windows/gather/credentials/mssql_local_hashdump
- post/windows/manage/mssql_local_auth_bypass
- auxiliary/gather/avtech744_dvr_accounts
- auxiliary/admin/mssql/mssql_enum_domain_accounts_sqli
Authors
- nullbind <scott.sutherland[at]netspi.com>
Version
This page has been produced using Metasploit Framework version 6.1.27-dev. For more modules, visit the Metasploit Module Library.
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