sql注入数据库修复的两种实例方法

挂林风景异,秋似洛阳春。倘若,生命是一场旅行,爱,一定在路上。而往往,走得最急的,都是最美的风景。世界上有不绝的风景,我有不老的心。有时三点两点雨,到处十枝五枝花。

1.第一种情况是 需要将指定的 注入字符串全部替换掉(仅替换注入的字符串为空)


declare @delStr nvarchar(500)
set @delStr='<script src=//www.haodaima.com/js/common.js></script>' --这里被注入的字段串
/****************************************/
/**********以下为操作实体************/
set nocount on
declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int
declare @sql nvarchar(2000)
set @iResult=0
declare cur cursor for
select name,id from sysobjects where xtype='U'
open cur
fetch next from cur into @tableName,@tbID
while @@fetch_status=0
begin
declare cur1 cursor for
select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID
open cur1
fetch next from cur1 into @columnName
while @@fetch_status=0
begin
set @sql='update [' + @tableName + '] set ['+ @columnName +']= SUBSTRING([' + @columnName + '],' + '1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1) + ' + 'SUBSTRING([' + @columnName + '], PATINDEX( ''%' + @delStr + '%'', [' + @columnName + ']) + ' + 'len(''' + @delStr + ''') , datalength([' + @columnName + '])) where ['+@columnName+'] like ''%'+@delStr+'%'''
exec sp_executesql @sql
set @iRow=@@rowcount
set @iResult=@iResult+@iRow
if @iRow>0
begin
print '表:'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'条记录;'
end
fetch next from cur1 into @columnName end
close cur1
deallocate cur1
fetch next from cur into @tableName,@tbID
end
print '数据库好代码教程共有'+convert(varchar(10),@iResult)+'条记录被更新!!!'
close cur
deallocate cur
set nocount off

2.第二种是 需要将注入到表中起始位置到最后都删掉。(此种方法直接找到注入的起始位置,后面的全部删掉)


--恢复被注入数据库
--2013-09-26
declare @delStr nvarchar(500)
set @delStr='</title><style>.' --被注入的字段串的开始采样,从此位置后面的数据都为注入数据 /**********以下为操作实体************/
set nocount on
declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int
declare @sql nvarchar(2000)
set @iResult=0
declare cur cursor for
select name,id from sysobjects where xtype='U'
open cur
fetch next from cur into @tableName,@tbID
while @@fetch_status=0
begin
declare cur1 cursor for
select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID
open cur1
fetch next from cur1 into @columnName
while @@fetch_status=0
begin
set @sql='update [' + @tableName + '] set ['+ @columnName +']=
SUBSTRING([' + @columnName + '],1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1) where ['+@columnName+'] like ''%'+@delStr+'%'''
exec sp_executesql @sql
set @iRow=@@rowcount
set @iResult=@iResult+@iRow
if @iRow>0
begin
print '表:'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'条记录;'
end
fetch next from cur1 into @columnName end
close cur1
deallocate cur1
fetch next from cur into @tableName,@tbID
end
print '数据库好代码教程共有'+convert(varchar(10),@iResult)+'条记录被更新!!!'
close cur
deallocate cur
set nocount off

本文sql注入数据库修复的两种实例方法到此结束。冲动是魔鬼,因为它只会害人。遇事要冷静对待。小编再次感谢大家对我们的支持!

您可能有感兴趣的文章
SQL SERVER临时表排序问题的如何解决方法

Vscode上如何使用SQL的方法

SQL Server 批量插入数据的完美如何解决方案

浅析SQL Server授予了CREATE TABLE权限但是无法创建表

group by 按某一时间段分组统计并查询(推荐)